Recently I've started collecting those tiny arcades boxes, and found some information to wire them so they stay on the demo mode. This way they can be used as a decoration. Here's an example vid of what I'm going to do: https://youtu.be/kea0oIe023I.
Instead of having it run in demo mode though I want to have the two buttons and little joystick get random inputs. So far I haven't been able to find any little chip to accomplish this with. My idea would be to find a chip with 6 or so pins that output signals randomly, one pin at a time. Is this something I can find?