void setup()
{
  size(800,600); //SET YOUR SIZE HERE
}
void draw()
{
  background(255);
  //DRAW EVERYTHING BELOW THIS LINE
  
  fill(#ff0000);
  rect(0,0,400,600);
  fill(0);
  ellipse(300,200,40,40);
  rect(200,500,200,80);
  
  pushMatrix();
  translate(400,0);
  fill(#0000ff);
  rect(0,0,400,600);
  fill(0);
  ellipse(100,200,40,40);
  rect(0,500,200,80);
  popMatrix();
  
  //DRAW EVERYTHING ABOVE THIS LINE
  fill(0); stroke(0); strokeWeight(1); textSize(20);
  text(mouseX+", "+mouseY,.05*width,.95*height);
}