const int RED_pin=5;

const int YELLOW_pin=3;

const int GREEN_pin=4;

const int pot_pin=A0

int pot_val;

​

void setup(){

Serial.begin(9600);

pinMode(RED_pin, OUTPUT);

pinMode(YELLOW_pin, OUTPUT);

pinMode(GREEN_pin,OUTPUT);

}

​

Void loop(){

pot_val= analogRead (pot_pin);

Serial.println(pot_val);

if(pot_val<=341){

digitalWrite(RED_pin, HIGH);

digitalWrite(YELLOw_pin, LOW);

digitalWrite(GREEN_pin, LOW);

}

else if (pot_val<=682){

digitalWrite(RED_pin, LOW);

digitalwrite(YELLOW_pin, HIGH);

digitalWrite(GREEN_pin, LOW);

}

else{

digitalWrite(RED_pin, LOW);

digitalWrite(YELLOW_pin, LOW);

digitalWrite(GREEN_pin, HIGH);

}

delay(500);

}

​