const int trigpin = 25;
const int echopin = 33;
int duration;
int distance;
int red = 15;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  pinMode(15, OUTPUT);
}

void loop() {
  distance = getdistance();
  Serial.println(("distance"+String(distance)));
  if(distance<200){
    digitalWrite(15, HIGH);
}
else{
  digitalWrite(15, LOW);
}
delay(1000);//this speeds up the simulation

}

long getdistance(){
  digitalWrite(trigpin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin, LOW);
  duration = pulseIn(echopin,HIGH);
  return(duration*0.034/2)+1;
}