Christmas Polka Dots

Christmas Polka Dots

/*
Christmas Polka Dots
By Chrys Wu, December 2010
info[at]chryswu[dot]com
Licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
http://creativecommons.org/licenses/by-nc-sa/3.0/
//*/

void setup () {
  size(960,600);
  background(255);
  noStroke();
  smooth();
}

void draw() {

}

/* 
Durstenfeld's version of the Fisher-Yates shuffle: http://en.wikipedia.org/wiki/Fisher–Yates_shuffle#The_modern_algorithm
Code adapted from http://forum.processing.org/topic/pixels-array-help
//*/

void shuffle(int[] a) {
  for (int i=a.length; i > 1; i--) {
    int randomNumber = int(random(i));
    int j = a[randomNumber];
    a[randomNumber] = a[i-1];
    a[i-1] = j;
  }
}

void mousePressed() {

  float rad_1 = random(40,75);
  float rad_2 = random(40,75);
  float rad_3 = random(40,75);  
  
  color pearl = color(139,26,26,235);
  color crimson = color(238,238,224,235);
  color evergreen = color(0,102,0,235);
  int[] colors = { pearl, crimson, evergreen };
  shuffle(colors);  
      
  fill(colors[0]);
  ellipse((mouseX - 30), (mouseY - 30), rad_1, rad_1);
  fill(colors[1]);
  ellipse((mouseX + 10), (mouseY - 35), rad_2, rad_2);
  fill(colors[2]);
  ellipse(mouseX, mouseY, rad_3, rad_3);
}

//* Save the work as a .png using the 's' key
void keyPressed() {
  if (key == 'w') {
    background(255);
    } else {
  if (key == 'b') {
    background(0);
    }
    }
}

Accidentally deleted the original gist. Forked to recover as many earlier revisions as possible. Revision 3b32ad is the final code.