#define ledPin 13
#define potPin A1

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

void loop() {
  // pot value ranges from 0 to 1023
  float potValue = analogRead(potPin);

  // delays in ms
  int minDelay = 100;
  int maxDelay = 1000;

  float multiplier = potValue/1023;

  float ledDelay = maxDelay - (maxDelay-minDelay)*(1-multiplier);

  Serial.println(ledDelay);
  digitalWrite(ledPin, HIGH);
  delay(ledDelay);
  digitalWrite(ledPin, LOW);
  delay(ledDelay);
}