const int led = 3;
const int potentiometer = A0;
double sensorValue = 0.0;
float i;

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

void loop() {
  // put your main code here, to run repeatedly:
  sensorValue = analogRead(potentiometer);
  i = sensorValue/1023*255;
  Serial.print("Anamog: ");
  Serial.print(sensorValue);
  Serial.print(", Brightness: ");
  Serial.println(i);
  analogWrite(led, i);
  delay(100);
}