int led=2;
int pot=A0;
void setup() {
  // put your setup code here, to run once:
pinMode(led, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int value=analogRead(pot);
if (value>=500){
  digitalWrite(led, HIGH);
}
else{
  digitalWrite(led, LOW);
}
}