[guide] message rickroll

That makes it work at startup? (I'm not going to restart right now so I might as well ask)

Assuming that it does do that, how do you hide CMD when the code is entered?

No, all "@echo off" does is make the command prompt load in the background.

If you do not put "@echo off" in the beginning it will load the script in plain sight, and look like this:

 Spoiler

But, if do put "@echo off " into the beginning the command prompt will look like this for a second and then disappear.

 Spoiler

It just makes it look better in my opinion.