Processing: Crystals

Crystals

int oWidth = 20;
int oHeight = oWidth;
int oX;
int oY;


void setup() {
  size(800,600);
  background(0);
  oX = floor(random(width/oWidth)) * oWidth;
  oY = floor(random(height/oHeight)) * oHeight;
}


void draw() {
  int bX = oX;
  int bY = oY;
  fill(200,random(1, 25));

  int o = floor(random(oWidth * 4));
  noStroke();
  rect(oX, oY, o, o);
  oX = constrain(oX + randomDirection(oWidth, 1), 0, width - oWidth);
  oY = constrain(oY + randomDirection(oHeight, 1), 0, height - oHeight);
  stroke(255, 45);
  line(bX,bY,oX, oY);
}

int randomDirection(int step, int factor) {
  int r = round(random(-factor,factor));
  return step * r;
}