#include <Adafruit_NeoPixel.h>
#define PIN 9
#define NUM_LEDS 2

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

#define BT 4
#define BTN 2
#define Vert 6
#define Rouge 10
#define Blanc 11
#define Orange 12
#define Bleu 13

int Bleu_State = LOW;
int Orange_State = LOW;
int brightness = 0;

unsigned long prevTime_T1 = millis ();
unsigned long prevTime_T4 = millis ();

long interval_T1 = 1500;
long interval_T4 = 800;
    
void setup() {
  Serial.begin(9600);
  pinMode(PIN, OUTPUT);
  pinMode(Blanc, OUTPUT);
  pinMode(Rouge, OUTPUT);
  pinMode(Bleu, OUTPUT);
  pinMode(Vert, OUTPUT);
  pinMode(Orange, OUTPUT);
  pinMode(BTN, INPUT_PULLUP);
  pinMode(BT, INPUT_PULLUP);
  digitalWrite(Blanc, HIGH);
  strip.begin();
}

void loop() {
  
  unsigned long currentTime = millis();
  
  // Task 1 LED Orange clignote rapidement
  if (currentTime - prevTime_T4 > 800) {
    Orange_State = !Orange_State;
    digitalWrite(Orange, Orange_State);
    
    prevTime_T4 = currentTime;
  }
  
  // Task 2 LED bleu clignote lentement
  if (currentTime - prevTime_T1 > 1500) {
    Bleu_State = !Bleu_State;
    digitalWrite(Bleu, Bleu_State);
    
    prevTime_T1 = currentTime;
  }

  //Task 3 Neopixels s'allument en jaune et flicker 
  strip.fill(strip.Color(255, 153, 0), 0, 2);// pixel color set to yellow
  strip.setBrightness(random(150,255)); // random brightness adjust for flicker effect
  strip.show();

  // Task 4 LED Vert s'allume avec BT
  if (digitalRead(BT) == HIGH){
    delay(30);
    digitalWrite(Vert, LOW);
  } else {
    digitalWrite(Vert, HIGH);
  }

	for (int bright = 255; bright = 0; bright --) {
      strip.setBrightness(bright); 
 	  strip.show();
   }

  // Task 5 LED Rouge flashe 4 fois avec BTN
  if (digitalRead(BTN) == LOW){
    //Je bloque tout "multitâche pendant 800*4=3200ms"
    for (int i=0; i<4; i=i+1) {
      digitalWrite (Rouge, HIGH);
      delay (400);
      digitalWrite (Rouge, LOW);
      delay (400);
     }
   }
    else{
      digitalWrite(Rouge, LOW);
   } 
}