#define potentiometer 4
#define led 13
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(potentiometer, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int maxAnalogue = 4095;
  int reading = analogRead(potentiometer);
  int readingMapping = map(reading,0,maxAnalogue, 0, 100);
  int brightness = map(readingMapping, 0, 100, 0, 50);
  analogWrite(led, brightness);
  Serial.print("Potentiometer: ");
  Serial.print(readingMapping);
  Serial.print(" ");
  Serial.print("Duty cycle:" );
  Serial.print(brightness);
  Serial.println();
  delay(10);
}