ctree - version 12

Author: Marco Alvarado
Category: Christmas Challenge
System:   Portable - presented on C64
Language: ANSI C (C65) Compiles with other C compilers
Len source code:  540
Len exe file:    1338
Len code only:   1338
Instructions:
Load the prg file on "https://virtualconsoles.com/online-emulators/c64/"
Description:
It is a standalone program, just load and it will run
Comments:
I had smaller versions, but this one is "correct", free of problems, clear, and have no tricks.  The idea was to make it small, but also "clear".  It is a mix between bitmap and calculated data (double mirroring the 1/4 of the original image).  It was possible to calculate the bitmap on the fly, but the complexity worked against the minimum code goal.