// constants won't change. They're used here to set pin numbers:
const int buttonPin = 5;  // the pin that the pushbutton is attached to
const int ledPin1 = A0;    // the pin that the LED is attached to
const int ledPin2 = A1;    // the pin that the LED is attached to
const int ledPin3 = A2;    // the pin that the LED is attached to

float brightness = 10;    // the pin that the LED is attached to

// Variables will change:
int ledState = LOW;        // the current state of the output pin
int buttonState;            // the current reading from the input pin
int lastButtonState = LOW;  // the previous reading from the input pin
int buttonPushCounter = 40;
// the following variables are unsigned longs because the time, measured in
// milliseconds, will quickly become a bigger number than can be stored in an int.
unsigned long lastDebounceTime = 0;  // the last time the output pin was toggled
unsigned long debounceDelay = 10;    // the debounce time; increase if the output flickers

void setup() {
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  // initialize the LED as an output:
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  // set initial LED state
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  digitalWrite(ledPin3, LOW);
  Serial.begin(9600);
}

void loop() {
  // read the state of the switch into a local variable:
  int reading = digitalRead(buttonPin);

  // check to see if you just pressed the button
  // (i.e. the input went from LOW to HIGH), and you've waited long enough
  // since the last press to ignore any noise:

  // If the switch changed, due to noise or pressing:
  if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer than the debounce
    // delay, so take it as the actual current state:

    // if the button state has changed:
    if (reading != buttonState) {
      buttonState = reading;

      // only toggle the LED if the new button state is HIGH
      if (buttonState == HIGH) {
        ledState = !ledState;
        buttonPushCounter+=10;
      }
    }
  }

  brightness = map(buttonPushCounter, 0, 90, 100, 255);
  Serial.print("brightness: ");
  Serial.println((255-brightness));
  analogWrite(ledPin1, (255-brightness));
  analogWrite(ledPin2, (255-brightness));
  analogWrite(ledPin3, (255-brightness));
  // Serial.println("on");
  // Serial.print("number of button pushes: ");
  // Serial.println(buttonPushCounter);
  // set the LED:
  if (buttonPushCounter > 90) {
    buttonPushCounter = 0;
    analogWrite(ledPin1, LOW);
    analogWrite(ledPin2, LOW);
    analogWrite(ledPin3, LOW);
  }

  // save the reading. Next time through the loop, it'll be the lastButtonState:
  lastButtonState=reading;
}