WTB: Big laser warning sign

I have a laser warning sign on my bedroom door, but its one I printed out , and its gray scale :-[

tbh just make your own. laminate an A5 printout

they look better than they do in the photo

Yeah, actually, that doesn't sound like a bad idea.

Why A5 though? That's smaller than A4, and I'd rather a nice big sign. I'm thinking A3, MAYBE even A2 if I can find a big enough printer

In fact, the problem is trying to find a giant colour printer... I'm sure there must be ONE on campus...