Ripples - OpenProcessing

mySketch
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ArrayList < Ripple > pond = new ArrayList < Ripple > ();
void setup() {
  fullScreen();
}
​
void draw() {
  background(0, 100, 255);
​
  for (Ripple thisRipple: pond) {
    thisRipple.render();
  }
​
}
​
void mouseClicked() {
​
  pond.add(new Ripple(mouseX, mouseY));
​
}
​
​
void mouseDragged() {
​
  pond.add(new Ripple(mouseX, mouseY));
​
}
​
class Ripple {
  //1. Attributes
  float xPos, yPos, radius, alpha;
  //2. Constructor
  Ripple(float x, float y) {
    xPos = x;
    yPos = y;
​
    radius = 0;
    alpha = 255;
  }
  //3. Actions
  void render() {
    noFill();
​
    strokeWeight(10);
    stroke(0, 120, 255, alpha);
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    ellipse(xPos, yPos, radius, radius);
​
    radius += 5;
    alpha -= 5;
  }
}