This effect simulates the snake crawling effect to draw a picture on the screen.
The resulting photo also produces a blurry effect.
Demo video1: https://www.youtube.com/watch?v=JUOtGPLuZuY
Demo video2: https://www.youtube.com/watch?v=uJbbqawGryI
This package include full source code and guide document!
Note: This effect utilizes Low-level graphics library - GL (the graphic will always be displayed on the top layer of the camera)