Requires firmware 4.2.1+
Requires Greenpois0n's BootLogo animate tool, it will be installed automatically

Limera1n Boot Logo for Greepois0n 4.2.1 jailbreak for use with animate. Limera1n logo turns like GP one then ra1ns. Only works with the version of animate that does 5 fps

BootLogo is configured from Settings.app

See More Info below for Screenshots