# Need help animating a bouncing object

**URL:** https://forums.synfig.org/t/need-help-animating-a-bouncing-object/16043
**Category:** Animation related help
**Created:** [December 18, 2024, 5:57pm UTC](https://forums.synfig.org/t/need-help-animating-a-bouncing-object/16043 "2024-12-18T17:57:21Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![Lae82](https://forums.synfig.org/user_avatar/forums.synfig.org/lae82/32/8646_2.png) [@Lae82](https://forums.synfig.org/u/Lae82)
#### Post date: [December 20, 2024, 4:25pm UTC](https://forums.synfig.org/t/need-help-animating-a-bouncing-object/16043/6 "2024-12-20T16:25:15Z")

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I found one example/solution you can try here.  
[jump\_trail.sifz](https://forums.synfig.org/uploads/short-url/6E9YzZMEwo5CFq606ez9WPJpd4R.sifz) (3.4 KB)

Advanced outline layers have much more parameters you can fiddle with. Even kind of making the effect you were looking for.

Its based on this thread and Darkspace\_be’s solution:

> [@Newbie Q: How do I leave a trail?](https://forums.synfig.org/t/newbie-q-how-do-i-leave-a-trail/4150/2):
>
> Ok, I think I can leave a trail by animating a gradient fill in a rectangle from white to the desired color but I’m making no progress on this. I created the rectangle filled with white, create the gradient and grouped it and the rectangle and set the ONTO. That part seems correct. I then set the start and end gradient color to white. Since this gradient fill trails the red circle I switched to animation mode, added a new key about 1 second behind the red circle and at that key I set the gradi…

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