Assignment 1: IO102

const int buttonPin = 2;
// Variables will change:
int buttonPushCounter = 0;   // counter for the number of button presses
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button
void setup() {
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  // initialize the LED as an output:
  // use a for loop to initialize each pin as an output:
  for (int thisPin = 8; thisPin <= 13; thisPin++) {
    pinMode(thisPin, OUTPUT);
  }

  // initialize serial communication:
  Serial.begin(9600);
}
void loop() {
  // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);

  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
    // if the state has changed, increment the counter
    if (buttonState == HIGH) {
      // if the current state is HIGH then the button went from off to on:
      buttonPushCounter++;
      Serial.println("on");
      Serial.print("number of button pushes: ");
      Serial.println(buttonPushCounter);
    } else {
      // if the current state is LOW then the button went from on to off:
      Serial.println("off");
    }
    // Delay a little bit to avoid bouncing
    delay(50);
  }
  // save the current state as the last state, for next time through the loop
  lastButtonState = buttonState;
  // Press the button for the 1st time : 6 LEDs will be on.
  if (buttonPushCounter  == 1) {
    for (int thisPin = 8; thisPin <= 13; thisPin++) {
      digitalWrite(thisPin, HIGH);
    }
    
  } else if (buttonPushCounter  == 2) { // Press the button a 2nd time: 6 LEDs will turn off.
    for (int thisPin = 8; thisPin <= 13; thisPin++) {
      digitalWrite(thisPin, LOW);
    }
  } else if (buttonPushCounter  == 3) { // Press button a 3rd time: run "Knight Rider" mode. 
    for (int thisPin = 8; thisPin <= 13; thisPin++) {
      // turn the pin on:
      digitalWrite(thisPin, HIGH);
      delay(100);
      // turn the pin off:
      digitalWrite(thisPin, LOW);
    }
  } else { // Press button a 4th time: turn off the 6 LEDs and reset the button Push Counter.
    for (int thisPin = 8; thisPin <= 13; thisPin++) {
      digitalWrite(thisPin, LOW);
    }
    buttonPushCounter = 0;
  }
}