I need to make a advergers staked cake, 5 tiers, and make some masks and faces with the lighted eyes, I have no idea how to, please I really need help!!!!

avengers-birthday-cake-5-tiers-lighted-cake

I really need to know!!! help please!!!!

Is this for a paying customer?

Yes, its for a paying customer

OK, to answer the question, you could likely use balloon lights.  They are very small.

Secondly, Avengers is a copyrighted image, so the only way you can make the cake legally is to get permission from the copyright owner.  This is always a problem when doing cakes that replicate characters, logos, etc.