Add FINAL_LEDSTRIP(EDIT)

Built upon the previous code but I doubt it'll compile in this state. Needs some debugging.

FINAL_LEDSTRIP(EDIT)

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+#include <Arduino.h>
+#include <FastLED.h>
+
+#define NUM_LEDS 300 // How many leds in your strip?
+//defining locations of pins
+#define DATA_PIN 2
+#define BUTTON_PIN 4 //should eventually change to be a value input
+
+//file object to store csv
+//File dataFile;
+
+int roundCounter = 1; //# of rounds to be iterated on
+int correctLED = 88; //an arbitrary number
+int maxRounds = 5; 
+int mode; //The mode the user wants to do
+int lightOn = 50; // time light will be on in mode 2
+double loopDelay = 1.0;
+unsigned long correctTime = 0;
+unsigned long reactionTime = 0;
+unsigned long startTime = 0;
+unsigned long loopTime = 0;
+volatile bool buttonFlag = false; // idk
+unsigned volatile long buttonPressTime = millis(); // idk
+
+//variable test
+unsigned int randomLED; //random LED ranging from 0 - 299
+unsigned long variableStartTime = 0;
+unsigned long variableEndTime = 0;
+unsigned long variableTotalTime;
+float convertedTime; // od work
+int numTests; // evaluate utility
+unsigned char counter = 0; // evaluate utility
+String color = String("Red"); //Let the user eventually set the color
+//perhpas a pinproblem 
+
+
+
+
+CRGB leds[NUM_LEDS]; // Define the array of leds
+
+void buttonPressed() {
+  unsigned long current = millis(); // change perhaps
+  if(buttonPressTime + 100 < current) {
+    buttonFlag = true;
+    buttonPressTime = current;
+  } // if
+} // buttonPressed
+
+void printPressed(int counter, long delayed, long diff, long correct) {
+  if (abs(diff) < 10){
+     Serial.println("Perfect timing!");
+     Serial.println(counter, delayed, correct);
+  } else if (diff > 0) {
+     Serial.print("Too early! Time difference: ");
+     Serial.println(counter, delayed, abs(diff));
+  } else if (diff < 0) {
+     Serial.print("Too late! Time difference: ");
+     Serial.println(counter, delayed, abs(diff));
+  } // if - else
+      buttonFlag = false;
+} // printPressed
+
+void setup() {
+  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
+  Serial.begin(115200);
+  pinMode(BUTTON_PIN, INPUT_PULLUP);  //use internal pullup resistor
+  randomSeed(analogRead(0)); //make sure analog pin 0 is't connected!!!
+  attachInterrupt(buttonPin, buttonPressed, FALLING); 
+  Serial.println("Which mode would you like to run?");
+  Serial.println("1 - CAT");
+  Serial.println("2 - Fixed Reaction Time");
+  Serial.println("3 - Variable Reaction Time");
+  Serial.println("4 - Whack - A - Mole");
+  Serial.print("Enter Mode Number:");
+  while (Serial.available() == 0) {
+  } //maybe "if"
+  mode = Serial.parseInt(); //error handling for if improper string entered
+
+  Serial.println("");
+  Serial.println("");
+} // setup
+
+//assumes mode = 1
+void catLoop() {
+  if (roundCounter > maxRounds) {
+      fill_solid(leds, NUM_LEDS, CRGB::Black);  // turn LEDs off
+      FastLED.show();
+      Serial.println("Max rounds reached. Stopping program.");
+      while (true) {
+        // Program is effectively stopped here
+      } // while
+      return; // Exit the loop function and stop further execution
+  } // if
+ for (int i = 0; i < NUM_LEDS; i++) {
+      //turns light on to white, delays, turns it off(black)
+      leds[i] = CRGB::White;
+      FastLED.show();
+      //delay(loopDelay); // i kept this
+      delayMicroseconds(loopDelay);
+      leds[i] = CRGB::Black;
+      if (i == correctLED) {
+        correctTime = millis();
+        FastLED.show(); //idk here the cod was missing parenthesis
+      } // if
+      if (buttonFlag) { // button press output
+        unsigned long timeDiff = correctTime - buttonPressTime;
+        printPressed(roundCounter, loopDelay, timeDiff, correctTime);
+      } // if 
+    roundCounter++;
+    } // for
+} // catLoop
+
+//assumes mode = 2
+void fixedRxnTime() {
+     if (roundCounter > maxRounds - 1) {
+      fill_solid(leds, NUM_LEDS, CRGB::Black);  // turn LEDs off
+      FastLED.show();
+      Serial.println("Max rounds reached. Stopping program.");
+      while (true) { //wouldn't this never run anything then? infinite loop
+        // Program is effectively stopped here
+      } // while
+      return; // Exit the loop function and stop further execution
+    } // checks for running completion if
+
+    //turns light on to white, delays, turns it off(black)
+    leds[correctLED] = CRGB::White;
+    FastLED.show();
+    correctTime = millis();
+    delay(lightOn);
+    leds[correctLED] = CRGB::Black;
+    FastLED.show();
+    delayMicroseconds(loopDelay);
+    if (!buttonFlag) {
+       Serial.println("Button missed");
+    } else {
+      unsigned long timeDiff = correctTime - buttonPressTime;
+      printPressed(roundCounter, loopdelay, timeDiff, correctTime);
+    } // button press output
+  } // if
+} //fixedRxnTime
+
+//assumes mode = 3
+void variableRxnTime() {
+  FastLED.setBrightness(50); //50 is uint8_t - unsigned 8 bit int (0-255)
+  while (counter != numTests) {
+    Serial.println("Press when ready");
+     while (digitalRead(BUTTON_PIN) == HIGH) {
+     } // waits until the user presses the button
+  } // while
+  while (digitalRead(BUTTON_PIN) == HIGH) {
+  } // waits until the user presses the button - change
+  delay(3000);
+  randomLED = random(300);
+  Serial.println(randomLED); //prints to the terminal the random LED index for testing
+  leds[randomLED] = CRGB::color;
+  FastLED.show();
+  startTime = millis();
+  while (digitalRead(BUTTON_PIN) == HIGH) {
+  }
+  endTime = millis();
+  delay(3000);
+  leds[randomLED] = CRBG::Black; //turns the LED off
+  FastLED.show();
+  variableTotalTime = (variableEndTime - variableStartTime);
+  Serial.print("Your reaction time was: ");
+  Serial.print(convertedTime);
+  Serial.println(" seconds!");
+  startTime = 0;
+  endTime = 0;
+  counter++;
+}
+
+void loop() {
+  switch (mode) {
+    case 1:
+      catLoop();
+      break;
+    case 2:
+      fixedRxnTime();
+      break;
+    case 3:
+      variableRxnTime();
+      break;
+  }
+} // loop
+
+//remove a round if not used 

Final_Code

@@ -0,0 +1,35 @@
+#include <Arduino.h>
+#include <FastLED.h>
+
+#define NUM_LEDS 300 // How many leds in your strip?
+
+//defining locations of pins
+#define DATA_PIN 2
+#define BUTTON_PIN 4
+
+CRGB leds[NUM_LEDS]; // Define the array of leds
+
+//file object to store csv
+//File dataFile;
+
+
+/*
+*
+*
+*
+*/
+
+void setup() {
+  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);  // GRB ordering is assumed
+  Serial.begin(9600); //set the baud rate
+  pinMode(BUTTON_PIN, INPUT_PULLUP);  //use internal pullup resistor
+  //attachInterrupt(buttonPin, buttonPressed, FALLING); !!!
+
+} // setup
+
+void loop() {
+
+
+} // loop
+
+//remove a round if not used