I don't know what equipment would do this, and I don't know how to search google for it:
I am looking for #1) a very small low cost laser. I may end up being able to use a keychain laser pointer.
#2) a device to change the pinpoint of laserlight into a pattern of a square.
How would this be accomplished? Some sort of optical device, a lens or prism, that would accept laser pinpoint input, and output that pinpoint50 times lined up in a square.