// if values are constant use #define if u want to change use a variable
#define trigger1 8
#define trigger2 5
//here trigger used to start transmistion (send ultasonic sound/signal)

#define echo1 7
#define echo2 4
// reflection of the object

void setup() {
  // put your setup code here, to run once:
  pinMode(trigger1, OUTPUT);  pinMode(echo1, INPUT);
  pinMode(trigger2, OUTPUT);  pinMode(echo2, INPUT);

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print(getDistance(trigger1, echo1));
  Serial.print(" ");
  Serial.println(getDistance (trigger2, echo2));
  delay(100);



}

float getDistance(int trig, int echo)
{
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  //what happened here for 10 milliseconds it sends a signal and top the signal (ultra sonic sound)

  unsigned long t = pulseIn(echo, HIGH);
  //returns the dustion in milliseconds
  float d = 340 * (t/1000000.0)/2.0;
  return d;
}