int potvalue =A0;
int led =3;
int pot = 0;

void setup() {
  // put your setup code here, to run once:
pinMode(potvalue, INPUT);
pinMode(led, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
pot= analogRead(potvalue);
Serial.println(pot);
pot=map(pot,0,1023,0,255);
if(pot>=150) {
 digitalWrite(led, HIGH);
}
  else {
 digitalWrite(led, LOW);
  }
 
  

}