Sample arduino code

led_tits.ino

int ledSpeed = 1, buttonVal = 0, ledState = 0;
const int buttonPin = 7, buttonPressAcknowledgedPin = 11;//, allOnPin = 11, blinkingPin = 4;

const int ledPins[] = 
{ 
  2, // red
  8, // yellow
  12  // blue
};

void ledsBlink(int duration)
{
  // this is required to ensure that all lights reset after a button press
    for (int i = 0; i < 3; i++)
    {
      digitalWrite(ledPins[i], LOW);
    }
    // turn each LED on for the duration
    for (int i = 0; i < 3; i++)
    {
      digitalWrite(ledPins[i], HIGH);
      delay(duration);
      digitalWrite(ledPins[i], LOW);
    }
}

void ledsOff()
{
  for (int i = 0; i < 3; i++)
  {
    digitalWrite(ledPins[i], LOW);
  }
}

void ledsOn()
{
  for (int i = 0; i < 3; i++)
  {
    digitalWrite(ledPins[i], HIGH);
  }
}

void setup()
{
  Serial.begin(9600);
  Serial.println("Initializing pins");  // initialize pins as outputs
  for (int i = 0; i < 3; i++)
  {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(buttonPin, INPUT);
  pinMode(buttonPressAcknowledgedPin, OUTPUT);
  Serial.println("Entering loop");
}

void loop()
{
  // read the button state
  if (digitalRead(buttonPin) == HIGH)
  {
    digitalWrite(buttonPressAcknowledgedPin, HIGH);
    delay(2000);
    digitalWrite(buttonPressAcknowledgedPin, LOW);
    Serial.println(ledState);
    if (ledState == 2)
    {
      ledState = -1;
    }
    ledState++;
    // for ghetto debugging
    if (ledState == 0)
    {
      Serial.println("All LEDs should now be off");
    }
    else if (ledState == 1)
    {
      Serial.println("All LEDs should now be on");
    }
    else if (ledState == 2)
    {
      Serial.println("The LEDs should now be blinking");
    }
    Serial.println(ledState);
  }
  // Check the button value. If it's off, then let the lights do their thing
  if (ledState == 2)
  {
    ledsBlink(ledSpeed);
    if (ledSpeed >= 1000)
    {
      ledSpeed = 1;
    }
    else
    {
      ledSpeed *= 2;
    }
  }
  // if the button is on, then turn all lights on
  else if (ledState == 1)
  {
    ledsOn();
  }
  
  else if (ledState == 0)
  {
    ledsOff();
  }
  
}