Any recommendations on a G code to test fire the laser on Smoothie?

Any recommendations on a G code to test fire the laser on Smoothie? Would like to make a macro button to test fire the laser.

I will try it out.

Works great. I was making macro buttons with that a few weeks ago

Any way to make a macro button with this:
M3
G1 Z0.1 F1
M5

I had to manually put M3 in.