# Need help with some 'advanced keyboard movement'

**URL:** <https://forum.kirupa.com/t/need-help-with-some-advanced-keyboard-movement/103456>\
**Category:** Uncategorized\
**Created:** [March 5, 2004, 8:55am UTC](https://forum.kirupa.com/t/need-help-with-some-advanced-keyboard-movement/103456 "2004-03-05T08:55:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ya3](https://avatars.discourse-cdn.com/v4/letter/y/e95f7d/32.png) [@ya3](https://forum.kirupa.com/u/ya3)\
**Post date:** [March 5, 2004, 8:55am UTC](https://forum.kirupa.com/t/need-help-with-some-advanced-keyboard-movement/103456/1 "2004-03-05T08:55:18Z")

</div>

Hi

I’m starting a new game where the user  
rides a jetski through the water, dodges  
stuff and shoots enemies along the way  
(based around a 007-style theme).

What I need is some help coding the movement  
of the jetski (left and right). All I can do is  
this:

[AS]onEnterFrame = function() {  
if (Key.isDown(Key.RIGHT)) {  
jetski.\_x += 10;  
}  
}[/AS]  
(and do the same for ‘left’, of course)

As you can see its very basic and will  
only make very ‘linear’ movement. What  
I need is to sort-of ‘ease’ the motion of  
the jetski. Like ‘skidding’ a little bit.

I think it’s a mathematical thing…  
Quadratics? :puzzle:

Please help! :beam:

Thanks in advance.