#include <FastLED.h>

#define NUM_LEDS  8
#define LED_PIN   8
#define pinPhoto  3

CRGB leds[NUM_LEDS];

int etatPhoto = HIGH ;


void setup() {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(150);


  pinMode(pinPhoto, INPUT_PULLUP);
}

void loop() {

static int compteurGong = 0;

  etatPhoto = digitalRead(pinPhoto) ;
   if (etatPhoto == LOW) {
       compteurGong = compteurGong +1 ;
       if (compteurGong == 5){
        compteurGong = 0 ;
       }
   }
      fill_solid(leds, NUM_LEDS, CRGB::Black);
      FastLED.show();
      delay(10);
  
  switch(compteurGong){
        case 1 :
      fill_solid(leds, NUM_LEDS, CRGB::Red);
      FastLED.show();
      delay(100);
      break ;
  
  
         case  2 :
  fill_solid(leds, NUM_LEDS, CRGB::Green);
      FastLED.show();
      delay(100);
      break ;

         case 3 :
    fill_solid(leds, NUM_LEDS, CRGB::Blue);
      FastLED.show();
      delay(100);
       break ;

      default :
 
      fill_solid(leds, NUM_LEDS, CRGB::Black);
      FastLED.show();
      delay(100);
      break ;
  }
  
}