multicolor skeleton on single filament printer

This 5-color design is printed on a single-filament printer (Ender3).
You print one color at a time, very thin, then change filament color and print the next file. The layers are thin enough that the extruder tip is able to pass over them. The final piece is about 1mm thick.

The filament touching the bed becomes the front of the finished piece, and the design gets reversed left to right.

Do not relevel the bed or disturb the print in between colors.

5 files, each numbered for the order to be printed and named so you can figure out your own colors. I used:
1) purple for the outline of flowers and leaf veins
2) pink for the flowers
3) green for leaves
4) white for bones
5) black for background.

The white came out rather translucent and spread; I probably needed to use a cooler bed and/or extruder temperature.

I started with an original line drawing, then used Pixlr* to create the different color layers, and AnyConv to convert them to STLs. *Photoshop wo