Flashing Gameobjects on mobile Device

Hi at all,

I haven´t found anything to exatly this problem, so please help :-).
I wanna flashing gameobjects/Mesh with a fade effect,
for example
a metal textutered mesh, should fade to complete white in 30 seonds.
Is it possible with unity? I have absolutly no idea and I´m not a shader man :wink:

if it is possible (I think so), would it cost too much performance on mobile device?

Thanks for help.

sorry for my bad english, i should write this in my signature xD

have anyone a generel idea how to solve it for example on desktop plattform?
does anyone know what i mean?

thanks

EDIT:
OK, I have an example for what i mean
http://www.youtube.com/watch?v=oZy02TyMvVE

Look at the emenies when they die