#include <FastLED.h>

// How many leds in your strip?
#define NUM_LEDS 300

//defining locations of pins
#define DATA_PIN 2
#define BUTTON_PIN 4

// Define the array of leds
CRGB leds[NUM_LEDS];

//assigning locations of pins
int buttonPin = 8;
int ledPin = 13; 


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
  
} //void setup


void loop() {
  // Move a single LED down the strip
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Red;  // Set the current LED to red
    FastLED.show();       // Display the updated LED colors
    //delay(0.001);           // Wait for 100 milliseconds
    delayMicroseconds(100);



    leds[i] = CRGB::Black;  // Turn off the current LED
    FastLED.show();         // Update the strip
  }
}