int led = 3;
int potvalue = A0;
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 > 200) {
  digitalWrite(led, HIGH);
  }
  else{
  digitalWrite(led, LOW);
  }
}