int pinEchoon = 15;
int pinTrigon = 14;

int pinEchooff = 4;
int pinTrigoff = 2;

int timeon;
int distanceon;

int distanceoff;
int timeoff;

void setup() {
  pinMode(pinTrigon, OUTPUT);
  pinMode(pinEchoon, INPUT);
  pinMode(pinTrigoff, OUTPUT);
  pinMode(pinEchooff, INPUT);
  pinMode(5, OUTPUT);
  Serial.begin(9600); 
}
void loop() {
  // on off the trig pin, the ultrasound is send
  digitalWrite(pinTrigon, LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrigon, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrigon, LOW);
  timeon = pulseIn(pinEchoon, HIGH); //receive the value of the ultrasound, valeur de l'aller retour
  digitalWrite(pinTrigoff, LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrigoff, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrigoff, LOW);
  timeoff = pulseIn(pinEchooff, HIGH);
  distanceon = timeon * 0.034 / 2; //calcultate the distance according to the value of sound
  distanceoff = timeoff * 0.034 / 2;
  Serial.print("Distanceon: ");
  Serial.print(distanceon);
  Serial.println(" cm");
  Serial.print("Distanceoff: ");
  Serial.print(distanceoff);
  Serial.println(" cm");  
  if (distanceon < 10){
    digitalWrite(5, HIGH);
    Serial.println("1");
  }
  else if (distanceoff < 10){
    digitalWrite(5, LOW);
    Serial.println("0");
  }
  delay(500);
}