Evaluate an analog value through the ADC on the Arduino Nano

Yes, and because I like it small, there's the Arduino Nano. I did roughly the same again based on the Nano. In this case I connected the input from the Poti with the delay of the LED LOW. I can now regulate the blinking frequency. Here's a picture of the setup on my breadboard:

int potiPin = 0;
int potiVal = 0;
int ledPin = 2;

void setup() {
  int potiPin = 0;
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int potiVal = analogRead(potiPin);
  digitalWrite(ledPin, HIGH);
  delay(100);
  digitalWrite(ledPin, LOW);
  delay(potiVal*2);
}