// Example draw program
// Four event handlers

// Event at start of program
void setup() {
  size(400,400);
}

// Event each frame
void draw() {
}

// Event while mouse clicked and dragged
void mouseDragged() {
  ellipse(mouseX,mouseY,20,20);
}

// Event when key is pressed
void keyPressed() {
  save("pic.jpg");
}