These are some footprints I made, which can be stacked in four layers for printing. Using fluorescent filament can create a ghostly effect! I used Hatchbox fluorescent PLA, and the results were excellent. Use your Bambu scraper or a similar tool carefully to separate the individual footprints. If you decide to slice the stacked STL files yourself, scale the X and Y dimensions to the size you need, and keep the Z at 100% to ensure the stack is printable. Happy Halloween!

Update:

I've included configuration files for printing two layers side by side and printing a single footprint separately, in case you're having trouble with layered printing.