int ledPin = 10;
int potPin = A2;
int potVal;
int dt = 300;
int light;

void setup() {
 pinMode(ledPin, OUTPUT);
 pinMode(potPin, INPUT);
 Serial.begin(9600);
}

void loop() {
 potVal = analogRead(potPin);
 Serial.println(potVal);

  light = map(potVal,0,1023,0,255);

 analogWrite(ledPin, light);
 delay(dt);

}