Mousepressed

void setup() {
  size(300, 300);
}

void draw() {

  background(mouseX, mouseY, mouseX);
  fill(250);


  if (mousePressed) {
    background(150);
    fill(mouseX, mouseY, mouseX);
  }


  ellipse(50, 50, 50, 55);
  ellipse(75, 100, 70, 35);
  rect(110, 50, 90, 20);
  ellipse(170, 85, 15, 15);
  rect(190, 100, 10, 10);
  ellipse(205, 100, 5, 5);
  rect(210, 110, 5, 5);
  ellipse(205, 120, 5, 5);
  rect(220, 115, 5, 5);
  }