How to make animation on GUI

Sorry, that this question may be really trivial, but I’m a total newbie in graphic. I Am trying to create animation on Canvas GUI. I want to make something similar like you can see in this video from MMX (game whole created in Unity) On this video you can see, that there is animated circle on the top center of screen. How the hell they made it? I was wondering, that it is created by unity particle system, but I cant use particle system on canvas. Have anybody any clue how to create similar effect?

That seem to work for me : How can I draw a ParticleSystem over the new Unity 4.6 UI? - Questions & Answers - Unity Discussions