Blue Ice Illusion:

For the rotational optical illusions, there are two ways to see the illusion. The first way is to move your head in and out from the screen. Focus on the center as you do this. 

This first blue illusion will also work with your peripheral vision, as your eyes naturally move around the page and the illusion, it will appear to move.

For the First Illusion in this collection, check this out! Blue Ice Illusion:
The circles will appear to move clockwise and counterclockwise depending on whether you are moving forward or away. You can also find this illusion in the Desktop Wallpaper section, so you can set it as your background on your computer.