Before Qubits

Here a 4- bit computer like 64-bit modern computers. The game intractable with wires of computer transistors. There some logic gates(AND, OR , XOR, Half Adder, Full Adder) that will be used for logics. Luckily, Now you can add 2 digital numbers and observe how the computer computes with its transistors. Its a 4 bit adder computer. Have a fun!!!