int trigger=12;
int echo=14;
float distance;

void setup() {
Serial.begin(115200);
pinMode(trigger, OUTPUT);
pinMode(echo, INPUT);

}

int ultraperformance(){
digitalWrite(trigger, LOW);
delay(10);
digitalWrite(trigger, HIGH);
delay(100);
digitalWrite(trigger,LOW);
distance=pulseIn(echo, HIGH);
return(distance*0.034/2)+1;

}
void loop() {
  
  int actual_distance= ultraperfomance();
  serial.prinit(actual_distance);

  if(actual_distance>300){
  digitalwrite(green,HIGH);
    digitalWrite(red, LOW);
    digitalWrite(orange, LOW);
    digitalWrite(green, LOW);

  }

  else if(actual_distance>=200 && actual_distance< =300){
    digitalWrite(orange_light, HIGH);

    
else if(actual_distance>=200 && actual_distance< =200){
    digitalWrite(red_light, HIGH);
    
    else(digitalWrite(red, LOW);//
    digitalWrite(orange, LOW);//
    digitalWrite(green, LOW;//