diff --git a/.DS_Store b/.DS_Store
index efe23c0..d708e00 100644
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diff --git a/PHYS112/.DS_Store b/PHYS112/.DS_Store
new file mode 100644
index 0000000..5008ddf
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diff --git a/PHYS112/HaldrupHW1.pdf b/PHYS112/HaldrupHW1.pdf
new file mode 100644
index 0000000..b9b97b1
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diff --git a/PHYS112/HaldrupHW2.pdf b/PHYS112/HaldrupHW2.pdf
new file mode 100644
index 0000000..328c8b9
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diff --git a/PHYS112/HaldrupHW3.pdf b/PHYS112/HaldrupHW3.pdf
new file mode 100644
index 0000000..272900a
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diff --git a/PHYS112/HaldrupHW5.pdf b/PHYS112/HaldrupHW5.pdf
new file mode 100644
index 0000000..7becc67
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diff --git a/Research/pygameSim/CytoSim b/Research/pygameSim/CytoSim
index e8f5108..41c2aec 160000
--- a/Research/pygameSim/CytoSim
+++ b/Research/pygameSim/CytoSim
@@ -1 +1 @@
-Subproject commit e8f51086d48273a645fe4c988301f1401762e099
+Subproject commit 41c2aecf88dee9efe9896171d4d70dc89f0c4d75
diff --git a/csci218/Assignments/output/pi.out b/csci218/Assignments/output/pi.out
new file mode 100755
index 0000000..bec3702
Binary files /dev/null and b/csci218/Assignments/output/pi.out differ
diff --git a/csci218/Assignments/pi.c b/csci218/Assignments/pi.c
new file mode 100644
index 0000000..1b21bf8
--- /dev/null
+++ b/csci218/Assignments/pi.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <math.h>
+
+double piWallis(int n);
+double piGregory(int n);
+double piNilakantha(int n);
+double piEuler(int n);
+void piCompare(double pi);
+
+
+int main() {
+
+  int n = 10000;
+  double pi;
+
+  pi = piWallis(n);
+  piCompare(pi);
+  pi = piGregory(n);
+  piCompare(pi);
+  pi = piNilakantha(n);
+  piCompare(pi);
+  pi = piEuler(n);
+  piCompare(pi);
+}
+
+double piWallis(int n) {
+  int top = 0;
+  int bottom = 1;
+  double pi = 1;
+  for (int i = 0; i < n; i++) {
+    top += ((i + 1) % 2) * 2;
+    bottom +=  (i % 2) * 2;
+    pi *= (float)top / (float)bottom;
+  }
+  pi *= 2;
+  printf("The %d of pi is: %lf\n",n ,pi);
+  return pi;
+}
+
+double piGregory(int n) {
+  int top = 4;
+  int bottom = 1;
+  double pi = 0;
+
+  for (int i = 0; i < n; i++) {
+    bottom = (1 + (2 * i))  * pow(-1, i);
+    pi += (float)top / (float)bottom;
+  }
+  printf("The %d of pi is: %lf\n",n ,pi);
+  return pi;
+}
+
+double piNilakantha(int n) {
+  int top = 4;
+  int bottom;
+  double pi = 3;
+
+  for (int i = 1; i < n; i++) {
+    bottom = (2*i) * (2*i+1) * (2*i+2) * pow(-1, i - 1);
+    pi += (float)top / (float) bottom;
+  }
+
+  printf("The %d of pi is: %lf\n",n ,pi);
+  return pi;
+}
+
+double piEuler(int n) {
+  int bottom;
+  double pi = 0;
+
+  for (int i = 0; i < n; i++) {
+    bottom = pow(i+1,2);
+    pi += 1.0 / bottom;
+  }
+  pi = sqrt(6 * pi);
+  printf("The %d of pi is: %lf\n",n ,pi);
+  return pi;
+}
+
+void piCompare(double pi) {
+  double diff;
+
+  diff = M_PI - pi;
+  printf("%lf\n", diff);
+}
diff --git a/csci218/Labs/.DS_Store b/csci218/Labs/.DS_Store
index 4d4d3d4..161b98c 100644
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diff --git a/csci218/Labs/Lab7/Lab 7 Tables.pdf b/csci218/Labs/Lab7/Lab 7 Tables.pdf
new file mode 100644
index 0000000..da40702
Binary files /dev/null and b/csci218/Labs/Lab7/Lab 7 Tables.pdf differ
diff --git a/csci218/Labs/Lab7/autoNightlight/autoNightlight.ino b/csci218/Labs/Lab7/autoNightlight/autoNightlight.ino
new file mode 100644
index 0000000..fc60643
--- /dev/null
+++ b/csci218/Labs/Lab7/autoNightlight/autoNightlight.ino
@@ -0,0 +1,66 @@
+/* Name: Garrett Haldrup 
+<autoNightLight.ino>
+Problem: Measure the output of a photo sensor and control leds based on light level
+Certification of Authenticity:
+I certify that this assignment is entirely my own work.
+*/
+const int lightSensorPin = A0;
+const int START_LED = 2;
+const int END_LED = 8;
+
+
+int pinValue;
+float pinValueVolt;
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  for (int i = START_LED; i <= END_LED; i++) {
+    pinMode(i, OUTPUT);
+    digitalWrite(i, LOW);
+  }
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  pinValue = analogRead(lightSensorPin);
+  pinValueVolt = (5.0 / 1023) * pinValue;
+
+
+  Serial.print("Pin Value: ");
+  Serial.print(pinValue);
+  Serial.print(" Voltage: ");
+  Serial.print(pinValueVolt, 2);
+  Serial.println("V");
+
+
+  switch (pinValue) {
+    case 0 ... 99:
+      for (int i = START_LED; i <= END_LED; i++) {
+        digitalWrite(i, HIGH);
+      }
+      break;
+    case 100 ... 399:
+      for (int i = START_LED; i <= END_LED - 3; i++) {
+        digitalWrite(i, HIGH);
+      }
+      for (int i = END_LED - 2; i <= END_LED; i++) {
+        digitalWrite(i, LOW);
+      }
+      break;
+    case 400 ... 799:
+      for (int i = START_LED; i <= END_LED - 5; i++) {
+        digitalWrite(i, HIGH);
+      }
+      for (int i = END_LED - 4; i <= END_LED; i++) {
+        digitalWrite(i, LOW);
+      }
+      break;
+    default:
+      for (int i = START_LED; i <= END_LED; i++) {
+        digitalWrite(i, LOW);
+      }
+      break;
+
+  }
+}
diff --git a/csci218/Labs/Lab7/interfacingLightSensorVolt/interfacingLightSensorVolt.ino b/csci218/Labs/Lab7/interfacingLightSensorVolt/interfacingLightSensorVolt.ino
new file mode 100644
index 0000000..85eba46
--- /dev/null
+++ b/csci218/Labs/Lab7/interfacingLightSensorVolt/interfacingLightSensorVolt.ino
@@ -0,0 +1,26 @@
+/* Name: Garrett Haldrup 
+<interfacingLightSensorVolt.ino>
+Problem: Measure the output of a photo sensor and output the pin value and voltage value
+Certification of Authenticity:
+I certify that this assignment is entirely my own work.
+*/
+int lightSensorPin = A0;
+
+int pinValue;
+float pinValueVolt;
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  pinValue = analogRead(lightSensorPin);
+  pinValueVolt = (5.0 / 1023) * pinValue;
+
+  Serial.print("Pin Value: ");
+  Serial.print(pinValue);
+  Serial.print(" Voltage: ");
+  Serial.println(pinValueVolt, 2);
+}
diff --git a/csci218/Labs/Lab8/lab8.c b/csci218/Labs/Lab8/lab8.c
new file mode 100644
index 0000000..72cf8e4
--- /dev/null
+++ b/csci218/Labs/Lab8/lab8.c
@@ -0,0 +1,258 @@
+/* Name: Garrett Haldrup
+lab8.c
+Problem: Has programs that convert C° to F°, and 7 different patterns and calculating mean and sd of users grades. 
+Certification of Authenticity:
+I certify that this assignment is entirely my own work.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+void temperatureChart();
+void apporxSqrt();
+void patternA(int n);
+void patternB(int n);
+void patternC(int n);
+void patternD(int n);
+void patternE(int n);
+void patternF(int n);
+void patternG(int n);
+void hwMean();
+void hwStats();
+
+int main() {
+
+  temperatureChart();
+  //apporxSqrt();
+  patternA(8);
+  patternB(8);
+  patternC(8);
+  patternD(8);
+  patternE(8);
+  patternF(8);
+  patternG(8);
+  //hwMean();
+  hwStats();
+
+  return 0;
+}
+
+void temperatureChart() {
+  int c;
+  float f;
+
+  printf("This program will convert from °C to °F from 0 to 200 every 10°C\n");
+
+  for (c = 0; c <= 200; c += 10) {
+    f = (c * 1.8) + 32;
+
+    printf("%d°C\t=   %.1f°F\n", c, f);
+  }
+}
+
+void apporxSqrt() {
+  int n, num;
+  float guess;
+
+  printf("This will estimate the square root of a number using newtons method\n");
+
+  printf("Enter number: ");
+  scanf("%d", &num);
+
+  printf("Enter n: ");
+  scanf("%d", &n);
+
+  guess = num / 2.0;
+
+  for (int i = 0; i < n; i++) {
+    guess = (guess + (num / guess)) / 2.0;
+  }
+
+  printf("%.1f\n", guess);
+}
+
+
+void patternA(int n) {
+  int num = 0;
+  int sum = 0;
+
+  printf("\nThis will show n values and sum of the pattern 2n\n");
+
+  num += 2;
+  sum += num;
+
+  printf("%d", num);
+
+  for (int i = 0; i < n; i++) {
+    num += 2;
+    sum += num;
+
+    printf(" + %d", num);
+  }
+  printf(" = %d\n", sum);
+}
+
+void patternB(int n) {
+  int num = 0;
+
+  printf("\nThis will show the values for the pattern (-1)^n*(2 + 4n)\n");
+
+  num = -6;
+  printf("%d", num);
+  for (int i = 1; i < n; i++) {
+    num = abs(num) + 4;
+    if (!(i % 2)) {
+      num *= -1;
+    }
+    printf(", %d", num);
+  }
+  printf("\n");
+}
+
+void patternC(int n) {
+  printf("\nThis will show the pattern of 4 * ((n + 1) %% 2)\n");
+  int num = 0;
+  printf("%d", num);
+  for (int i = 1; i < n; i++) {
+    num = 4 * (i % 2);
+    printf(", %d", num);
+  }
+  printf("\n");
+}
+
+void patternD(int n) {
+  int num = 1;
+  int sum = 0;
+
+  printf("\nThis will show the pattern and sum of 1 + 2n * ((n %% 2) - 1)\n");
+
+  sum += num;
+
+  printf("%d", num);
+
+  for (int i = 1; i < n; i++) {
+    num = abs(num + (2 * ((i) % 2))) * pow(-1, i);
+    if (i % 2) {
+      printf(" - %d", abs(num));
+    } else {
+      printf(" + %d", num);
+    }
+
+    sum += num;
+
+  }
+  printf(" = %d\n", sum);
+}
+
+void patternE(int n) {
+  printf("\nThis will show the pattern of 3^n\n");
+  int num = 3;
+  printf("%d", num);
+  for (int i = 1; i < n; i++) {
+    num = pow(3, i + 1);
+    printf(", %d", num);
+  }
+  printf("\n");
+}
+
+void patternF(int n) {
+  int top = 1;
+  int bot = 4;
+
+  printf("\nThis will show the pattern and product of (3^n-1)/2+2n\n");
+  float product = 1;
+
+  product *= (float)top / (float)bot;
+  printf("(%d/%d)", top, bot);
+
+  for (int i = 1; i < n; i++) {
+    top = pow(3, i);
+    bot += 2;
+    printf(" * (%d/%d)", top, bot);
+      
+    product *= (float)top / (float)bot;
+  }
+  printf(" = %.1f\n", product);
+}
+
+
+void patternG(int n) {
+  int num = 9;
+  int sum = 9;
+
+  printf("\nThis will show the pattern and sum of (2 + n)^2\n");
+
+  printf("%d", num);
+
+  for (int i = 1; i < n; i++) {
+    num = pow(i + 3, 2);
+    sum += num;
+
+    printf(" + %d", num);
+  }
+  printf(" = %d\n", sum);
+}
+
+void hwMean() {
+  int n;
+  float grades[20];
+  float mean;
+  float sum = 0;
+
+  printf("\nThe program will show the mean of your inputed grades\n");
+
+  printf("Enter the number of assignments: ");
+  scanf("%d", &n);
+
+  for (int i = 0; i < n; i++) {
+    printf("Enter your grade on HW%d: ", i + 1);
+    scanf("%f", &grades[i]);
+    sum += grades[i];
+  }
+  mean = sum / n;
+  printf("Your overall average is: %.1f\n", mean);
+
+
+}
+
+void hwStats() {
+  int n = 1;
+  float grades[20];
+  float mean;
+  float sum = 0;
+  float sd;
+  
+  printf("\nThe program will show the mean, and standard deviation of your inputed grades\n");
+
+  while(1) {
+    printf("Enter the number of assignments: ");
+    scanf("%d", &n);
+    if (n <= 20 && n > 0) {
+      break;
+    } else {
+      printf("Must be less than or equal to 20!\n");
+    }
+  }
+  
+
+  for (int i = 0; i < n; i++) {
+    printf("Enter your grade on HW%d: ", i + 1);
+    scanf("%f", &grades[i]);
+    sum += grades[i];
+  }
+  mean = sum / n;
+  printf("Your overall average is: %.1f\n", mean);
+
+
+  sum = 0;
+  for (int i = 0; i < n; i++) {
+    sum += pow(grades[i] - mean, 2);
+  }
+  
+  sd = sqrt((1.0/n) * sum);
+
+  printf("The standard deviation(σ) is: %.1f\n", sd);
+
+
+}
diff --git a/csci218/Labs/Lab8/output/lab8.out b/csci218/Labs/Lab8/output/lab8.out
new file mode 100755
index 0000000..7b9bd62
Binary files /dev/null and b/csci218/Labs/Lab8/output/lab8.out differ
diff --git a/csci218/Labs/Lab9/lab9.c b/csci218/Labs/Lab9/lab9.c
new file mode 100644
index 0000000..5110111
--- /dev/null
+++ b/csci218/Labs/Lab9/lab9.c
@@ -0,0 +1,150 @@
+/* Name: Garrett Haldrup
+lab9.c
+Problem: Contains multiple functions that focus on nested loops and 2D arrays. 
+Certification of Authenticity:
+I certify that this assignment is entirely my own work.
+*/
+
+#include <stdio.h>
+
+void triangle();
+void multiplicationTable();
+void fractionalSequence(int n);
+void twoDArrayMaxMin();
+void triangleN(int n);
+void multiplicationTableN(int n);
+
+
+int main() {
+  
+  triangle();
+  multiplicationTable();
+  fractionalSequence(15);
+  twoDArrayMaxMin();
+  triangleN(15);
+  multiplicationTableN(15);
+
+  return 0;
+}
+
+void triangle() {
+  int n = 10;
+  char symbol = '*';
+  int count = 1;
+
+  printf("\nThis program will show a trangle with width of n = 10 and symbol '*'.\n");
+  
+  for (int i = 0; i < n; i++) {
+    for (int j = 0; j < n; j++) {
+      if (j >= n - (i + 1)) {
+        printf("%c ", symbol);
+      } else {
+        printf("  ");
+      }
+    }
+    printf("\n");
+    count++;
+  }
+}
+
+void multiplicationTable() {
+  int n;
+
+  printf("\nThis program will take your input and make a n x n multiplication table.\n");
+
+  printf("Enter n for a n x n multiplcaiton table: ");
+  scanf("%d", &n);
+
+  for (int i = 0; i < n; i++) {
+    for (int j = 0; j < n; j++) {
+      printf("%d\t", (i + 1) * (j + 1));
+    }
+    printf("\n");
+  }
+}
+
+void fractionalSequence(int n) {
+  long long int product = 1;
+
+  printf("\nThis program will show the a(n) = n! from a(1) => a(%d)\n", n);
+
+  printf("{");
+  for (int i = 1; i <= n; i++) {
+    product *= i;
+    if (i == n) {
+      printf("%lld}\n", product);
+    } else {
+      printf("%lld, ", product);
+    }
+  }
+}
+
+void twoDArrayMaxMin() {
+  int NUM_ROWS, NUM_COLUMN;
+  int max, min, maxI, maxJ, minI, minJ;
+
+  printf("\nThis program will take your input for the size of a 2D array and values to fill the array then output the max and min of the 2D array\n");
+
+  printf("Enter number of rows: ");
+  scanf("%d", &NUM_ROWS);
+
+  printf("Enter number of columns: ");
+  scanf("%d", &NUM_COLUMN);
+
+  int nums[NUM_ROWS][NUM_COLUMN];
+
+  for (int i = 0; i < NUM_ROWS; i++) {
+    for (int j = 0; j < NUM_COLUMN; j++) {
+      printf("Enter value for nums[%d][%d]: ", i, j);
+      scanf("%d", &nums[i][j]);
+      if (!i && !j) {
+        max = nums[i][j];
+        maxI = i;
+        maxJ = j;
+        min = nums[i][j];
+        minI = i;
+        minJ = j;
+      } else if (nums[i][j] < min) {
+        min = nums[i][j];
+        minI = i;
+        minJ = j;
+      } else if (nums[i][j] > max) {
+        max = nums[i][j];
+        maxI = i;
+        maxJ = j;
+      }
+    }
+  }
+  printf("The max of nums is at nums[%d][%d] is: %d\n", maxI, maxJ, max);
+  printf("The min of nums is at nums[%d][%d] is: %d\n", minI, minJ, min);
+}
+
+void triangleN(int n) {
+  char symbol = '*';
+  int count = 1;
+
+  printf("\nThis program will show a trangle with width of n = %d and symbol '*'.\n", n);
+  
+  for (int i = 0; i < n; i++) {
+    for (int j = 0; j < n; j++) {
+      if (j >= n - count) {
+        printf("%c ", symbol);
+      } else {
+        printf("  ");
+      }
+    }
+    printf("\n");
+    count++;
+  }
+}
+
+void multiplicationTableN(int n) {
+  printf("\nThis program will make a %d x %d multiplication table.\n", n, n);
+  
+  for (int i = 0; i < n; i++) {
+    for (int j = 0; j < n; j++) {
+      printf("%d\t", (i + 1) * (j + 1));
+    }
+    printf("\n");
+  }
+}
diff --git a/csci218/Labs/Lab9/lab9.out b/csci218/Labs/Lab9/lab9.out
new file mode 100755
index 0000000..c2a4852
Binary files /dev/null and b/csci218/Labs/Lab9/lab9.out differ
diff --git a/csci218/Lect/108.c b/csci218/Lect/108.c
new file mode 100644
index 0000000..91d3ada
--- /dev/null
+++ b/csci218/Lect/108.c
@@ -0,0 +1,181 @@
+
+
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+void ex1();
+void ex2();
+void ex3();
+void ex4();
+void ex5();
+void ex6();
+void ex7();
+void ex8();
+
+int main()
+{
+  ex1();
+    ex2();
+  ex3();
+  ex4();
+  ex5();
+  ex6();
+  ex7();
+  ex8();
+
+    return 0;
+}
+void ex1(){
+    printf("\nThis program count how many negative numbers exist in the array.\n");
+    int nums[] = { 3, -2, 1, -1, 8, 9, -4};
+    //declare a variable to accumulate negative numbers
+  int numNeg = 0;
+    
+    //calculat the # of elements of array
+  int len = sizeof(nums)/sizeof(nums[0]);
+    
+    //iterate arrays 
+  for (int i = 0; i < len; i++) {
+    if (nums[i] < 0) {
+      numNeg++;
+    }
+  }
+    
+    printf("There are %d negatives in the array\n", numNeg);
+    
+
+
+}
+void ex2(){
+    printf("\nThis program count how many odds  exist in the array\n");
+    
+    int nums[] = { 3, -2, 1, -1, 8, 9, -4};
+    //declare a variable to accumulate # of odd numbers
+  int numOdd = 0;
+    
+    //calculat the # of elements of array
+  int len = sizeof(nums)/sizeof(nums[0]);
+    
+    //iterate arrays 
+  for (int i = 0; i < len; i++) {
+    if (nums[i] % 2) {
+      numOdd++;
+    }
+  }
+    
+    printf("There are %d odds in the array\n", numOdd);
+    
+
+
+}
+void ex3(){
+    printf("\nThis program replace the negative numbers as 0 in the array\n");
+    int nums[] = { 3, -2, 1, -1, 8, 9, -4};
+  int len = sizeof(nums)/sizeof(nums[0]);
+    
+    //iterate arrays and 
+  for (int i = 0; i < len; i++ ){
+    if (nums[i] < 0) {
+      nums[i] = 0;
+    }
+  }
+    
+    //display the aupdated array
+  printf("The array looks like:");
+  for (int i = 0; i < len; i++) {
+    printf(" %d", nums[i]);
+  }
+  printf("\n");
+}
+
+void ex4(){
+  printf("\nThis program will take an input string and determine the number of alphas\n");
+    //Count how many alphabet letters in a string
+    printf("Please enter a string no more than 50 characters: ");
+    char var[50]; 
+    //get the string from the user
+    
+  scanf("%s", var);
+    //declare a variable to accumulate # of alphabet
+  int numAlpha = 0;
+    
+    //calculat the # of elements of the string
+  int len = sizeof(var)/sizeof(var[0]);
+    
+    //iterate the string 
+  for (int i = 0; i < len; i++) {
+    if (isalpha(var[i])) {
+      numAlpha++;
+    }
+  }
+    
+    printf("There are %d alphabet in the string\n", numAlpha);
+    
+
+
+}
+
+void ex5(){
+    printf("This program ask for a string, then convert all alphabet as uppercase.\n");
+    char str[51];
+    printf("Please enter a string no more than 50 characters: ");
+  scanf("%s", str);
+
+  for (int i = 0; i < strlen(str); i++) {
+    if (isalpha(str[i])) {
+      str[i] = toupper(str[i]);
+    }
+  }
+    
+  printf("Modified String: %s\n", str);
+    
+}
+
+void ex6(){
+    printf("This program  concatenate a string to another.\n");
+    char str1[50] = "Hello! ";
+    char str2[50] = "csci218";
+
+  strcat(str1, str2);
+
+  printf("Concated string: %s\n", str1);
+    
+
+}
+void ex7(){
+    printf("This program find the maximum of the array.\n");
+    int nums[] = { 3, -2, 1, -1, 8, 9, -4};
+  
+    //declare a variable the hold the maximum found so far
+  int max = nums[0];
+  int len = sizeof(nums)/sizeof(nums[0]);
+    
+    //iterate the array and update the maximum
+  for (int i = 1; i < len; i++) {
+    if (nums[i] > max) {
+      max = nums[i];
+    }
+  }
+    printf("the maximum is %d\n", max);
+    
+}
+void ex8(){
+    printf("This program find the maximum of the array and its index.\n");
+    int nums[] = { 3, -2, 1, -1, 8, 9, -4};
+    //declare a variable the hold the maximum found so far
+  int max = nums[0];
+  int maxI = 0;
+  int len = sizeof(nums)/sizeof(nums[0]);
+    
+    //iterate the array and update the maximum
+  for (int i = 1; i < len; i++) {
+    if (nums[i] > max) {
+      max = nums[i];
+      maxI = i;
+    }
+  }   
+    //iterate the array and update the maximum
+    printf("the maximum is %d, the index is %d\n", max , maxI);
+    
+}
diff --git a/csci218/Lect/output/108.o b/csci218/Lect/output/108.o
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