Background made of triangles or squares

Hi,

I am making some game and I want to fill my background over time like in next picture:

83995-amazingfingers.jpg

So, when user taps the screen I want to start filling my background from inside out with squares different color each. I tried solution where I made an array of images but it is too heavy for GPU.
Does anyone know solution.

Thank You,
Sasa G

It might be tricky to accomplish without that being too GPU intensive, no matter how you go about it.
I know there is movie texture support, not sure how much better that is than an image array though.

Someone online recommended someone with a similar question might look here:

For something in that project regarding procedurally animated"Fractal Geometry" that could be used for a 2d background

Unity Asset Store - The Best Assets for Game Making no longer loads. Do you know what asset this was, or if it still exists?