// Simple program to show all RGB combinations
//
// Pressing 1(2) increases (decreases) red
// Pressing 3(4) increases (decreases) green
// Pressing 5(6) increases (decreases) blue

// Variable declarations
int redComponent;
int greenComponent;
int blueComponent;
int updateAmount = 5;

void setup ()
{
  size(300,300);
  
  // Start with a nice, neutral gray
  redComponent = 125;
  greenComponent = 125;
  blueComponent = 125;
}

void draw ()
{
  background(redComponent, greenComponent, blueComponent);
}

void keyPressed ()
{
  if (key == '1')
    redComponent = redComponent + updateAmount;
  else if (key == '2')
    redComponent = redComponent - updateAmount;
  else if (key == '3')
    greenComponent = greenComponent + updateAmount;
  else if (key == '4')
    greenComponent = greenComponent - updateAmount;
  else if (key == '5')
    blueComponent = blueComponent + updateAmount;
  else if (key == '6')
    blueComponent = blueComponent - updateAmount;
  
  println("Red: " + redComponent + "\tGreen: " + greenComponent + "\tBlue: " + blueComponent);
}