All you Terminator fans will remember this one.

I made this by creating a 3mm pad with a 1mm pocket joined with this, https://www.thingiverse.com/thing:3264282, thank you very much.

Sliced in cura, with a pause at height one layer after "SKYNET" starts, to change filament to red, then the same just after the grille stats, to change filament to black.