#define LED_PIN1 9
#define LED_PIN2 10
#define LED_PIN3 11
#define BUTTON_PIN 8

byte lastButtonState = LOW;
byte ledState = LOW;

unsigned long debounceDuration = 05; // millis
unsigned long lastTimeButtonStateChanged = 0.00;

void setup() {
  pinMode(LED_PIN1, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);

	pinMode(LED_PIN2, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);

	pinMode(LED_PIN3, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
}

void loop() {
  if (millis() - lastTimeButtonStateChanged > debounceDuration) {
    byte buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == LOW) {
        ledState = (ledState == HIGH) ? LOW: HIGH;
        digitalWrite(LED_PIN1, ledState);
				digitalWrite();
				delay(100);
      }
    }
  }
	if (millis() - lastTimeButtonStateChanged > debounceDuration) {
    byte buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == LOW) {
        ledState = (ledState == HIGH) ? LOW: HIGH;
        digitalWrite(LED_PIN2, ledState);
				delay(100);
      }
    }
  }
	if (millis() - lastTimeButtonStateChanged > debounceDuration) {
    byte buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) {
      lastTimeButtonStateChanged = millis();
      lastButtonState = buttonState;
      if (buttonState == LOW) {
        ledState = (ledState == HIGH) ? LOW: HIGH;
        digitalWrite(LED_PIN3, ledState);
				delay(100);
      }
    }
  }
}