Pressing the 'A' key or 'B' key on your keyboard will turn on the corresponding light. And, when both keys are pressed at the same time both lights turn on. If the lights are turned on together enough times, they'll *LEARN* to both turn on at the same time even if only 1 of the keys is pressed! Then, after only 1 key is used by itself enough times the lights will go back to turning on separately.
This is based on the Hydraulic Model of a Two-Input Conditional Certainty System by Dr. Albert Uttley: https://www.sciencedirect.com/science/article/pii/S0019995859900580
