# Problem with missing ball (foo)
**URL:** https://discourse.processing.org/t/problem-with-missing-ball-foo/19276
**Category:** Coding Questions
**Created:** [April 1, 2020, 5:08am UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276 "2020-04-01T05:08:43Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@paulstgeorge](https://discourse.processing.org/u/paulstgeorge)
#### Post date: [April 1, 2020, 5:08am UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/1 "2020-04-01T05:08:43Z")
I have a sketch (see below) where a ball moves. When I tested it, everything seems to work but now the ball has gone off the screen to the right somewhere. How do I get my ball back?
```auto
Ball[] balls = new Ball[1];
void setup() {
size(400, 400);
balls[0] = new Ball(40, 127); // diameter and colour
}
void draw() {
background(255);
for (int i = 0; i < balls.length; i++) {
balls[i].display();
balls[i].move();
}
}
class Ball {
float dia;
float x;
float y;
float col;
float xspeed;
float yspeed;
float r;
Ball (float tempD, float tempC) {
x = random(0+dia, width-dia);
y = random(0+dia, height-dia);
dia = tempD;
col = tempC;
r = dia/2;
xspeed = 1.0;
yspeed = 0.0;
}
void display() {
noStroke();
fill(col);
ellipse(x, y, dia, dia);
}
void move() {
x = x + xspeed;
y = y + yspeed;
}
}
```
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [April 1, 2020, 2:02pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/2 "2020-04-01T14:02:32Z")
You can check for the screen border and then reverse the direction of the movement
see [https://www.processing.org/examples/bounce.html](https://www.processing.org/examples/bounce.html)
Remark
color is not really float. Either use int or even color.
see [https://www.processing.org/reference/color\_datatype.html](https://www.processing.org/reference/color_datatype.html)
---
### Author:  [@paulstgeorge](https://discourse.processing.org/u/paulstgeorge)
#### Post date: [April 1, 2020, 4:39pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/3 "2020-04-01T16:39:17Z")
Thanks. This was my very poor attempt to make an Aprilβs fool joke. I liked the idea that someone could be foolish enough to try to get their ball back. Looks like the joke is on me!
Noted about color not being a float.
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [April 1, 2020, 4:58pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/4 "2020-04-01T16:58:18Z")
Hey! How do you say?
You sent me in the April! π
I like it!!!
I was about to write restart your Sketch!
To get your ball back.
I am the April foolβ¦ π
---
### Author:  [@debxyz](https://discourse.processing.org/u/debxyz)
#### Post date: [April 1, 2020, 5:52pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/5 "2020-04-01T17:52:49Z")
I almost answered this post too!
π
---
### Author:  [@paulstgeorge](https://discourse.processing.org/u/paulstgeorge)
#### Post date: [April 1, 2020, 6:20pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/6 "2020-04-01T18:20:17Z")
Next year @debxyz π
---
### Author:  [@debxyz](https://discourse.processing.org/u/debxyz)
#### Post date: [April 1, 2020, 6:22pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/7 "2020-04-01T18:22:42Z")
LOL
Iβll mark my calendar.
π
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [April 1, 2020, 8:01pm UTC](https://discourse.processing.org/t/problem-with-missing-ball-foo/19276/8 "2020-04-01T20:01:25Z")
π
Warm regards
Chrisir