// Clignotement de 2 LED à fréquence différente

#define LED 13
#define LED2 2
int previousTime = 0; 
int previousTime2 = 0; 

void setup() {
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop() {
  int chrono = millis();
  if (chrono - previousTime >= 500) {
    previousTime = chrono;
    bool etatLED = digitalRead(LED);
    digitalWrite(LED, !etatLED);
  }
  int chrono2 = millis();
  if (chrono2 - previousTime2 >= 700) {
    previousTime2 = chrono2;
    bool etatLED2 = digitalRead(LED2);
    digitalWrite(LED2, !etatLED2);
  }
}