int echoPin = 2;
int trigPin = 3;
int echoPin1 = 4;
int trigPin1 = 5;
long duration_us, distance_cm;
long duration_us1, distance_cm1;
void setup(){
  Serial.begin(9600);
  pinMode(echoPin,INPUT);
  pinMode(trigPin,OUTPUT);
  pinMode(echoPin1,INPUT);
  pinMode(trigPin1,OUTPUT);
}

void loop(){

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration_us = pulseIn(echoPin, HIGH);
  distance_cm = duration_us / 58.0;
  Serial.print("Sensor1: ");
  Serial.println(distance_cm);

  delay(300);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);

  duration_us1 = pulseIn(echoPin1, HIGH);
  distance_cm1 = duration_us1 / 58.0;

  delay(300);
}