const int trigPin = 5;
const int echoPin = 18;
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701
long duration;
float distanceCm;
void setup() {
  Serial.begin(115200);
  pinMode(triqPin, OUTPUT);
  pinMode(echoPin, INPUT);
}
 void loop() {
  digitalWrite(trigPin, LOW);
    delay(10); 
}