Author: Milek Smyk <mileksmyk@gmail.com>
System: Commodore 64
Language: TASM (64tass Turbo Assembler Macro V1.55.2200?)
Length of source: 386 bytes
Length of executable: 46 bytes
Length of executed code: 44 (there is no BASIC stub, only 2 extra header bytes)
Instructions: install vice, drop the prg into it
The code draws the number of stars corresponding to successive lines of the xmas tree into the last screen line, then scrolls by one line.