Notes

const int buttonPin = 3;

//RGB LED pins
const int redPin = 11;
const int greenPin = 10;
const int bluePin = 9;


//create a variable to store a counter and set it to 0
int counter = 0;

long time = 0; // the last time the output pin was toggled
long debounce = 200;

void setup()
{
// Set up the pushbutton pins to be an input:
pinMode(buttonPin, INPUT);

// Set up the RGB pins to be an outputs:
pinMode(redPin, OUTPUT);
pinMode(greenPin,OUTPUT);
pinMode(bluePin,OUTPUT);
}


void loop()
{
// local variable to hold the pushbutton states
int buttonState;

//read the digital state of buttonPin with digitalRead() function and store the //value in buttonState variable
buttonState = digitalRead(buttonPin);

setColor(255, 0, 0); // red
delay(1000);
setColor(0, 255, 0); // green
delay(1000);
setColor(0, 0, 255); // blue
delay(1000);
setColor(255, 255, 0); // yellow
delay(1000);
setColor(80, 0, 80); // purple
delay(1000);
setColor(0, 255, 255); // aqua
delay(1000);

//if the button is pressed increment counter and wait a tiny bit to give us some
//time to release the button
if (buttonState == LOW && millis() - time > debounce) // light the LED
{
counter++;
delay(150);
}

//use the if satement to check the value of counter. If counter is equal to 0 all
//pins are off
if(counter == 0)
{
digitalWrite(redPin,LOW);
digitalWrite(greenPin,LOW);
digitalWrite(bluePin,LOW);
}

//else if counter is equal to 1, redPin is HIGH
else if(counter == 1)
{
digitalWrite(redPin,HIGH);
digitalWrite(greenPin,LOW);
digitalWrite(bluePin,LOW);
}

//else if counter is equal to 2 greenPin is HIGH
else if(counter ==2)
{
digitalWrite(redPin,LOW);
digitalWrite(greenPin,HIGH);
digitalWrite(bluePin,LOW);
}

//else if counter is equal to 3 bluePin is HIGH
else if(counter ==3)
{
digitalWrite(redPin,LOW);
digitalWrite(greenPin,LOW);
digitalWrite(bluePin,HIGH);
}
//else if counter is equal to 4 whitePin is HIGH
else if(counter ==4)
{
digitalWrite(redPin,HIGH);
digitalWrite(greenPin,HIGH);
digitalWrite(bluePin,HIGH);
}
//else reset the counter to 0 (which turns all pins off)
else
{
counter =0;
time = millis();
}


void setColor(int redValue, int greenValue, int blueValue)
{
analogWrite(redPin, redValue);
analogWrite(greenPin, greenValue);
analogWrite(bluePin, blueValue);
}
}