how do you make effect in the picture, trace tutorial ?
The effect is known as Ghosting.
These links should help:
http://forum.unity3d.com/threads/how-to-create-ghost-or-after-image-on-an-animated-sprite.334079/
http://gamedev.stackexchange.com/questions/75502/create-a-trailing-ghosting-effect-of-a-sprite
https://www.reddit.com/r/Unity2D/comments/3j5q8r/thought_i_would_share_a_very_basic_ghosting/
