#define PIN_LED 7
#define bp 4
#define DELAY_TIME 50
bool etat ;
bool etatPrecedent = LOW;
unsigned long tempsAppui = 0;

void setup() {
  pinMode(PIN_LED, OUTPUT);
  pinMode(bp, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  etat = digitalRead(bp);
  if (!etat == HIGH) {
    if (etatPrecedent == LOW){
      tempsAppui = millis();
    }
    if (millis() - tempsAppui > DELAY_TIME){
      digitalWrite(PIN_LED, !digitalRead(PIN_LED));
      Serial.println(etat);
    }
  }
  etatPrecedent = etat; 
}