int pinr = 3;
int ping = 5;
int pinb = 6;
int triggerpin = 8;
int echopin = A0;


void setup() {
  // put your setup code here, to run once:
  pinMode(pinr, OUTPUT);
  pinMode(ping, OUTPUT);
  pinMode(pinb, OUTPUT);
  pinMode(triggerpin, OUTPUT);
  pinMode(echopin, INPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(triggerpin, LOW);
  digitalWrite(triggerpin, HIGH);
  int value = pulseIn(echopin, HIGH);

  digitalWrite(pinr, HIGH);
  digitalWrite(ping ,LOW );
  digitalWrite(pinb, LOW);
  delay(value);

  digitalWrite(ping, HIGH);
  digitalWrite(pinb, LOW);
  digitalWrite(pinr, LOW);
  delay(value);

  digitalWrite(pinb, HIGH);
  digitalWrite(ping, LOW);
  digitalWrite(pinr, LOW);
  delay(value);


}