#define PIN_TRIG1 3
#define PIN_ECHO1 2

#define PIN_TRIG2 9
#define PIN_ECHO2 8

#define PIN_TRIG3 10
#define PIN_ECHO3 11

int ledr = 7;
int ledg = 6;
int ledy = 5;
#define buzzer 4
int sensor;

void setup () 
{
  Serial.begin(115200);
  pinMode(PIN_TRIG1, OUTPUT);
  pinMode(PIN_ECHO1, INPUT);

  pinMode(PIN_TRIG2, OUTPUT);
  pinMode(PIN_ECHO2, INPUT);

  pinMode(PIN_TRIG3, OUTPUT);
  pinMode(PIN_ECHO3, INPUT);

  pinMode(ledr, OUTPUT);
  pinMode(ledg, OUTPUT);
  pinMode(ledy, OUTPUT);

  pinMode(buzzer, OUTPUT);

  pinMode(A0, INPUT);
  
  //delay(500);
  //noTone(buzzer, sensor);

}

void loop () 
{


  sensor = analogRead(A0);
  // tone(buzzer, sensor);
  
  

  // Start a new measurement:
  digitalWrite(PIN_TRIG1, HIGH);
  delayMicroseconds(1);
  digitalWrite(PIN_TRIG1, LOW);

  // Read the result:
  int duration1 = pulseIn(PIN_ECHO1, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration1 / 58); //ULTRASONIK

 duration1 = duration1 / 58;

  digitalWrite(PIN_TRIG2, HIGH);
  delayMicroseconds(1);
  digitalWrite(PIN_TRIG2, LOW);

  int duration2 = pulseIn(PIN_ECHO2, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration2 / 58);

 duration2 = duration2 / 58;

  digitalWrite(PIN_TRIG3, HIGH);
  delayMicroseconds(1);
  digitalWrite(PIN_TRIG3, LOW);

  int duration3 = pulseIn(PIN_ECHO3, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration3 / 58);

 duration3 = duration3 / 58;

  

 if(duration1 <= 100)
  {
    tone(buzzer, sensor);
    digitalWrite(ledr, 1);
    // tone(buzzer, sensor);
  }

  if (duration1 >= 100)
  {
    noTone(buzzer);
    digitalWrite(ledr, 0);
  }
  
 if(duration2 <= 100)
  {
    // tone(buzzer, sensor);
    digitalWrite(ledg, 1);
  }

 if(duration2 >= 100)
  {
    //noTone(buzzer);
    digitalWrite(ledg, 0);
  }

  if(duration3 <= 100)
   {
     digitalWrite(ledy, 1);
   }

 if(duration3 >= 100)
  {
    digitalWrite(ledy, 0);
  }
  // else
  // {
  //  digitalWrite(ledg, 1);
  //  digitalWrite(ledr, 0);
  //  digitalWrite(ledy, 0);
  // }

  // delay(1000);
}