DailyUI 004: Calculator

Going oldschool with today's assignment back to the simplest and most original form of the calculator -- the abacus.

The idea is for the user to be able to learn how to use an abacus intuitively by directly manipulating the beads and seeing what happens to the numbers above.

Restricted to addition only for this concept. Some of the numbers don't actually add up to the result. This is intentional. The user learns how to use the abacus by getting the beads in the right spots.