# \_x \_y movement help

**URL:** https://forum.kirupa.com/t/-x--y-movement-help/155605
**Category:** flash
**Created:** [July 19, 2005, 3:50am UTC](https://forum.kirupa.com/t/-x--y-movement-help/155605 "2005-07-19T03:50:13Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ToXic](https://avatars.discourse-cdn.com/v4/letter/t/13edae/32.png) [@ToXic](https://forum.kirupa.com/u/ToXic)
#### Post date: [July 19, 2005, 3:50am UTC](https://forum.kirupa.com/t/-x--y-movement-help/155605/1 "2005-07-19T03:50:13Z")

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I was reading this very good tutorial on gravity and making an object bounce.  
[http://www.bit-101.com/tutorials/gravity.html](http://www.bit-101.com/tutorials/gravity.html)

After I played around with it, I wanted to add more circles on the stage to make 'em bonce too, but then I couldn’t, because it would move along with the first circle all the way, like it was stuck to it. Then I noticed on the code how it messes around with the \_x \_y properties… but then I thought, \_x and \_y coordinates of what?! This symbol, the other one… that other one…?!? Can somebody explain this better?  
Let’s say I wanted to add that code to 8 balls so they all bounce? How would I do it? Thnx.