import java.awt.AWTException;
import java.awt.Frame;
import java.awt.Robot;
 
Robot robot;
float angle;
int posX, posY;
 
void setup() {
  size(400, 400);
  smooth();
  try { 
    robot = new Robot();
  } 
  catch (AWTException e) {
    e.printStackTrace();
  }
  angle = 0;
  cursor(CROSS);
  // noCursor();
  mouseY = height / 2;
}
 
void draw() {
  float variationY = mouseY - height / 2;
  angle = angle + variationY / 200;
  background(255);
  translate(width / 2, height / 2);
  rotate(angle);
  ellipse(0, 0, 100, 100);
  line(-100, 0, 100, 0);
  Frame f =  (Frame) ((processing.awt.PSurfaceAWT.SmoothCanvas) surface.getNative()).getFrame();
  robot.mouseMove(f.getX() + width / 2, f.getY() + frame.getY() + height / 2);
}