Huge Problem/Brick Infection?

So I went back onto studio after a while of not playing ROBLOX, and it seems to be more lag, I looked inside my bricks and EVERY model/brick/spawn/script had this blue square with a script in it which moves your camera around and loads of messages come on your screen, named bryant90. I tried to fix this by using command:

Game.Workspace.Script.bryant90:remove()

It came up saying it wasn't a valid member.. help!

Try removing your plugins one by one. Also see if starting a new place (in Studio) will also infect the bricks. Also see if any of your plugins you are using are made by someone byrant90. If you have used free scripts, it might be one of those infecting you.