Brightness blinker

Concept & Method
In this assignment, I am using two LEDs, one switch (digital), and one slider potentiometer (analog). The switch controls the entire circuit, and the potentiometer controls the brightness of the LEDs.

Implementation

Code:

#define LED_PIN 3 
#define BUTTON_PIN 7
#define POTENTIO_PIN A1

byte lastButtonState = HIGH;
bool LEDOn = true;

void setup()
{
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop()
{
    byte buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) 
    {
      lastButtonState = buttonState;
      
      if (buttonState == HIGH) { // button has been released
        LEDOn = ! LEDOn;
      }
   }
  
  if (LEDOn) {
    int potentiometerValue = analogRead(POTENTIO_PIN);
    int brightness = map(potentiometerValue, 0, 1023, 0, 255);

    analogWrite(LED_PIN, brightness); 
    delay(100);                      // delay is in milliseconds
    analogWrite(LED_PIN, LOW);       // turn LED off (0V)
    delay(100);
  }
  else {
    digitalWrite(LED_PIN, LOW);
  }
}