#define echoPin A2
#define trigPin A1
#define buttonPin A5 
#define ledverte A4
#define ledorangé A3
#define ledrouge A0
#define buzzer A6
long duration, distance;

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(buttonPin, INPUT); 
  pinMode(ledverte, INPUT);
  pinMode(ledorangé, INPUT);
  pinMode(ledrouge, INPUT);
  pinMode(buzzer, INPUT);
}


void loop() {
  if (digitalRead(buttonPin) == LOW ) {
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    int duration = pulseIn(echoPin, HIGH);
    float distance = duration / 58.0;
    Serial.print("Distance in CM: ");
    Serial.println(distance);
    if(distance<100){
      digitalWrite(ledrouge, HIGH);
      digitalWrite(ledorangé, LOW);
      digitalWrite(ledverte, LOW);
      tone(buzzer, 1000);}
    else if(distance>=100 && distance<=300){
      digitalWrite(ledrouge, LOW);
      digitalWrite(ledorangé, HIGH);
      digitalWrite(ledverte, LOW);
      tone(buzzer, 300);}
    else if(distance>300){
      digitalWrite(ledrouge, LOW);
      digitalWrite(ledorangé, LOW);
      digitalWrite(ledverte, HIGH);
      noTone(buzzer);
}
}

    delay(1000);
    
  }
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