example_03_02_mouseX_mouseY.pde

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example 3-2: mouseX and mouseY

void setup() {
  size(480, 270);
}

void draw() {
  // Try moving background() to setup() and see the difference!
  background(255);

  // Body
  stroke(0);
  fill(175);
  rectMode(CENTER);

  // mouseX is a keyword that the sketch replaces with the horizontal position of the mouse.
  // mouseY is a keyword that the sketch replaces with the vertical position of the mouse.
  rect(mouseX, mouseY, 50, 50);
}