// Example 07-18 from "Getting Started with Processing" 
// by Reas & Fry. O'Reilly / Make 2010

void setup() {
  size(120, 120);
}

void draw() {
  pushMatrix();
  translate(mouseX, mouseY);
  rect(0, 0, 30, 30);
  popMatrix();
  translate(35, 10);
  rect(0, 0, 15, 15);
}