Algodoo

I think it would be very helpful if you were to label the inputs and outputs. I'm not sure but I think you have too many inputs and outputs. A 4 bit adder has two input bits plus a carry-in bit, and it has one output bit plus a carry-out bit. If you want to really make this an educational scene, you can show the truth table for a 4-bit full adder.

UPDATE: labeled input and outputs

I may one day make an algodoo CPU pureley of of logic gates at one point

but arent those two input bits both 4 bits

Yes. The 4-bit full adder adds two 4-bit binary numbers (plus carry-in) and produces a 4-bit summation (plus carry-out) which is the summation of the two 4-bit input (+ carry in) numbers. The logic in your scene works correctly except for the fact that most computer keyboards will not allow more than 2 or 3 keys to be pressed simultaneously (not a fault of your scene).

The way to get around that keyboard limitation is to use clickable digits in the scene. For example, a user can click as many input bits as they want to in order to enable or disable them. Of course that would require more work for the scene creator.

Im not that good with scripting, though ill try to work on a mechanical switch for each laser.

If you need help with some scripts I'd be happy to help you. Just leave comments concerning what you need help with.

Just need help with scripts to make lasers change color when the polygon they are on are clicked

Do you want the laser color to become the same color as the polygon that it's on? Or do you want the laser color to become some other color? Please be specific.

polygon that when clicked, toggles whatever laser thats attached to the polygon is between green and red like a toogle switch

Thaks, Xray The interface is now improved

Great! I'm glad that I was able to help.