#include <FastLED.h>

#define NUM_LEDS  120
#define LED_PIN   2

CRGB leds[NUM_LEDS];
uint8_t colorIndex[NUM_LEDS];

DEFINE_GRADIENT_PALETTE( greenblue_gp ) { 
  0,   0,  255, 245,
  46,  0,  21,  255,
  179, 12, 250, 0,
  255, 0,  255, 245
};
int i=37,j=0;
int tour=0;
CRGBPalette16 greenblue = greenblue_gp;
void clign(int i){
 leds[i]=CRGB(255,0,0);
  FastLED.show();
  delay(100);
  leds[i]=CRGB(0,0,0);
  FastLED.show();
  delay(100); 
}
void inverseLedOrder(int startLed, int endLed) {
  int numLeds = endLed - startLed + 1;
  int midPoint = numLeds / 2;
  
  for (int i = 0; i < midPoint; i++) {
    int j = numLeds - 1 - i;
    CRGB tmp = leds[startLed + i];
    leds[startLed + i] = leds[endLed - j];
    leds[endLed - j] = tmp;
  }
}
void setup() {
  Serial.begin(9600);
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);

  //Fill the colorIndex array with random numbers
  for (int i = 0; i < NUM_LEDS; i++) {
    colorIndex[i] = random8();
  }
}
void light(int i, CRGB color){
   if(i>36 && i<67){
     leds[66-i+37]= color;
   }
   else if(i>66 && i<91){
     leds[90-i+67]= color;
   }
  else{
    leds[i]= color;
    }
}
int numLed= 120;
bool delet=false;
byte tick=300;
void loop() {
  /*
  leds[16]=CRGB::Red;
  leds[36]=CRGB::Red;
  leds[37]=CRGB::Red;
  leds[66]=CRGB::Red;
  leds[67]=CRGB::Red;
  leds[90]=CRGB::Red;
  leds[91]=CRGB::White;
  leds[119]=CRGB(120, 101, 101);
  FastLED.show();*/
  /*Serial.println(analogRead(A0));
  if(analogRead(A0)>50){
  leds[2] = CRGB(255,0,0);FastLED.show();
  delay(random(100,500));
  leds[2] = CRGB(0,0,0);FastLED.show();
  leds[2] = CRGB(255,0,0);FastLED.show();
  delay(random(20,100));
  leds[2] = CRGB(0,0,0);FastLED.show();
  }
  */
  if(!delet){
  EVERY_N_MILLISECONDS(30){
  fadeToBlackBy(leds, NUM_LEDS, 30);
  if(i!=36 || tour!=3)
  light(i,CRGB(0,0,255));
  if (tour==0){
        if(i<numLed) 
            i++; //on fait un tour classique
        else
            tour=1; //puis on enchaine
    }

    if(tour==1){
        if(i>37) i--; //on descend
    else {
        tour=2;
        i=120-41;
        j=120-41; //milieu des leds
        }
    }
    if (tour==2) {
        light(j,CRGB(0,0,255));
        if(i>37) i--;
        if(j<numLed) j++;
        else if(tick>0){
          fadeToBlackBy(leds, NUM_LEDS, 30);
          tick--;
          Serial.println(tick);
        }
        else delet=true;
        }
  
  
  
    
  
  
  
  }
  }
FastLED.show();
}
/*
CRGBPalette16 palette = RainbowColors_p;
uint8_t hue = 0;
uint8_t starSpeed = 100;
void loop() {
  EVERY_N_MILLISECONDS(200){
  fadeToBlackBy(leds, NUM_LEDS, 20);
  int shootingStarPos = random(NUM_LEDS);
  for (int i = shootingStarPos; i < shootingStarPos + 5; i++) {
    if (i < NUM_LEDS) {
      light(i, ColorFromPalette(palette, hue, 255));
    }
  }
  FastLED.show();
  delay(starSpeed);
  hue++;
  }
}*/