Not exactly the design I started out to make. However, the puzzle piece took so long, I will have to eventually make the other design to justify the time I spent trying to get the top rounded just right.
A background your computer would choose. Humans use a 10 base, or 'decimal,' number system derived from our earliest counting devices, our fingers. Computers use 2 base, or 'binary' because they count with a series of switches: on or off.