Dong

int xmotion = 120;

int ymotion = 120;

int radius = 50;

int xspeed = 6;

int yspeed = 6;

int xdirection = 1;

int ydirection = 1;

​

void setup() {

  size(800, 800);

  background(0);

}

​

void draw () {

//  background(random(0, 50), 50);

noStroke();

fill(random(0,50), 50);

rect(0, 0, 800, 800);

fill(230);

  rect(mouseX, 0, 200, 50);

  fill(random(0,200), random(0, 200), 200);

  ellipse(xmotion, ymotion, radius, radius);

  ymotion += yspeed*ydirection; //moving

  xmotion += xspeed*xdirection; //moving

  //Am I hitting the bottom?

  if (ymotion> height- radius/2) {

    ydirection = -ydirection;

  }

  //Am I hitting the top?

  if (ymotion< 0+ radius/2) {

    ydirection = -ydirection;

  }

  //Am I hitting the right?

  if (xmotion> width- radius/2) {

    xdirection= -xdirection;

  }

  //Am I hitting the left?

  if (xmotion< 0+ radius/2) {

    xdirection = -xdirection;

  }

  //Am I hitting the box?

  if (ymotion< 0+ radius/2 + 50 && xmotion< mouseX + 200 && xmotion> mouseX) {

    ydirection = -ydirection;

    ymotion += radius;

  }

}