int potPin=A1;
int gPin=6;
int potVal;
float gVal;

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

void loop() {
  // put your main code here, to run repeatedly:
potVal=analogRead(potPin);
gVal=(255./1023.)*potVal;
analogWrite(gPin,gVal);
Serial.println(gVal);
}