Default [Q] Sony Xperia E black screen after changing bootanimation

So second day with my phone, I decide to root it! notice how much you can do with it such as changing the boot animations
So I download an app for changing the boot animation "Boot Animations ★ root".
I try out a few like the Aperture Science (works like a dream! except its too big for my screen)
So I change it again to blood drips (along those lines)
When it boots, it says "sony" like normal but then is just black! The buttons along the bottom are alight and so is the one at the top.
I can unlock it, it makes the sound and vibrates but I cannot see anything...

What have I done? What is up with the phone? How can I fix it?