Security through obscurity can be a powerful thing. Welcome to FAS Security Services (Fake Alarm Sign™). Local neighborhoods have been experiencing an increased level of criminal activity since 2020. The presence of a sign may decrease the likelihood of a burglary.
I made mine of PLA and screwed it to a wooden post near the house under a tree. Direct sunlight would dramatically shorten its life, but in shade it should serve for (hopefully) a year or three.
This print does require a filament change (Blue -> White). It would probably suffice to watch over the printer, and when it starts printing the logo, pause the print from the printer menu and change the filament.
I printed it with layer height 0.28 (first layer 0.2) using Cura. In my case, the first 7 layers made up the background and the remaining layers made up the printed logo. The Pause at Height g-code post-processing script can be used with layer 7 (check out various videos on YouTube describing how to use that feature). If you've not used Pause at Height before, you might want to do a practice run scaling it way down in the X and Y directions only.
This print is for an 8" sign. It came right off my stock Ender-3 surface. And as an added bonus, it should clean any old PLA off your bed!