balloon with mouse move.

void setup()
{
  size(500, 500);
}

void draw() {
  background(225);
  int xx = mouseX;
  int yy = mouseY;
  //mousemove
  if (xx < 75){
    xx = 75;
  } else if (xx > 425)
    xx = 425;
  if ( yy < 75) {
    yy = 75;
    fill(#FF0000);
  } else if (yy > 300) {
    fill(#0000FF);
  } else {
    fill(#FFFF00);
  }
      if (yy > 325) {
     yy = 325;
  }
   draw_ballon(xx, yy);
}
//draw_ballon
void draw_ballon(int x, int y) {
  ellipse(x, y, 150, 150);
  line(x, y+75, x, y+175);
}