Occupied/Vacant sign
thingiverse
We needed an occupied/vacant sign for rooms with one person max occupancy during COVID, so I made this. Simply hangs on door knob with string tied in two corner holes. Flip it around when you enter or leave. I printed in black and neon orange, but any contrasting colors should work. I just manually paused the print and switched filament after the first couple layers, and then switched back to black for last few layers. Note that the sign in the picture was scaled down to 90% in the slicer so take that into account.
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