This script will generate a Christmas tree. You can change the settings in the OpenSCAD file to get a tree of the size you want. Varying the perimeter speed and fan speed will get you different effects as you can see in the picture. Less cooling makes the tree branches more curly.
The attached files are for 0.3mm layer height and 0.6mm extrusion widths. This width is the default for the Prusa 0.3mm profile.
Directions:
Check out the decorations for the tree:
The author remixed this model.
Made a script for generating the tree, more branches, better layering.