Recursive Squares - OpenProcessing

mySketch
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float theta = 0;
float speed = -.000001;
float squareCount = 0;
boolean isPlaying = true;
​
void setup() {
 fullScreen();
 background(0);
 noFill();
 stroke(70, 173, 212);
 rectMode(CENTER);
}
​
void draw() {
 background(0);
 translate(width/2, height/2);
  recursiveSquares(600, 600);
}
​
void recursiveSquares(float length_, float height_) {
  rotate(theta);
  if(isPlaying) {
   theta += speed;
  }
  rect(0, 0, length_, height_);
  if (length_ > 0 & height_ > 0 && squareCount < 1000) {
   squareCount++;
   recursiveSquares(length_ + 5, height_ + 5); 
 }
  squareCount = 0;
}
​
void keyPressed() {
  isPlaying = !isPlaying;
}