#define PINLEDROUGE 2
#define PINDEMANDEPIETON 8

bool bDemandePieton = 0;

void setup()
{
  pinMode(PINLEDROUGE, OUTPUT);
  pinMode(PINDEMANDEPIETON, INPUT_PULLUP);
}

void loop()
{
  bDemandePieton = digitalRead(PINDEMANDEPIETON);
  if(bDemandePieton == 0){
  	digitalWrite(PINLEDROUGE, HIGH);
  }
  else{
    	digitalWrite(PINLEDROUGE, LOW);
  }
}