An enhanced adder which uses two half-adders.

Check out my last entry on a half-adder: https://ldjam.com/events/ludum-dare/46/tyson-lee-keep-it-alive-edition/my-game-can-add-so-i-dont-have-to

Come tinker and play at: https://ldjam.com/events/ludum-dare/46/tyson-lee-keep-it-alive-edition