#define LED_PIN 8
#define BUTTON_PIN 7 

byte lastButtonState;
byte ledState = LOW;

unsigned long lastTimeButtonStateChanged = millis();
unsigned long debounceDuration = 50;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
  lastButtonState = digitalRead(BUTTON_PIN);
}

void loop() {
  if (millis() - lastTimeButtonStateChanged >= debounceDuration) {
  byte buttonState = digitalRead(BUTTON_PIN);
  if (buttonState != lastButtonState){
    lastTimeButtonStateChanged = millis();
    lastButtonState = buttonState;
    if (buttonState == LOW) {
      if (ledState ==HIGH) {
        ledState = LOW;
      }
      else{
        ledState = HIGH;
      }
      digitalWrite(LED_PIN, ledState);
    }
  }
}
}