int diuration;
int distance;

void setup() {}

pinMod(5, INPUT); ee
pinMode(6, OUTPUT);
pinMode(13, OUTPUT);
pinMode (12, OUTPUT);..
Serial.begin(115200);

  // put your setup code here, to run once:

}

void loop() {
 digitalWrite(6, LOW);

 delay(1000);

 digitalWrite(6, HIGH);

 digitalWrite(6, LOW);

 duration=pulseIn(5,HIGH);

 distance= duration*0.034/2;

 Serial.println(distance);

 if (distance>100)

 {digitalWrite(13, HIGH);

 digitalWrite(12, LOW);}

 else (distance<50);

 (digitalWrite(12, HIGH);

 digitalWrite(13, LOW);digitalWrite(6, LOW);

delay(1000);

digitalWrite(6, HIGH);

digitalWrite(6, LOW);

duration=pulseIn(5,HIGH);

distance= duration*0.034/2;

Serial.println(distance);

if (distance>100)

{digitalWrite(13, HIGH);

digitalWrite(12, LOW);}

else (distance<50);

(digitalWrite(12, HIGH);

digitalWrite(13, LOW);

delay(1000);)
  // put your main code here, to run repeatedly:

}