#include <FastLED.h>
#define LED_PIN 14
#define NUM_LEDS 16
CRGB leds[NUM_LEDS];
int fadeValue = 0;
int cr = 255;
int cg = 255;
int cb = 255;

bool ledOn = false;
int btnPin = 12;


void setup() {
  Serial.begin(115200);


  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.clear();


  pinMode(btnPin, INPUT_PULLUP);
}
void loop() {
  uint8_t state = digitalRead(btnPin);
  Serial.println((state));


  if (digitalRead(btnPin) == LOW ){
    ledOn = true;
    fadeValue = 255;
    delay(200);
  }


  if (ledOn) {
      if (fadeValue > 0) {
    //    leds[0].setRGB(fadeValue, fadeValue, fadeValue);
      for (int i = 1; i < 16; i += 2) {
        
        leds[i].setRGB(cr-i*10, cg-i*20, cb-i*30);
      }
        fadeValue -= 5; // Adjust this value to change fade speed
      } else {
        ledOn = false;
      for(int i=0;i<16;i++)
          leds[i].setRGB(0, 0, 0);
      }
  }
  FastLED.show();
  delay(20);
}