Fun fun fun!

Pressing a switch to make one LED go on and the other go off:

Pressing a switch to make a thrilling cascade of colored light:

A random number generator – pressing the button causes one of the seven lights to light up at random:

Behold! I have harnessed the power of Las Vegas itself! I will enthrall the multitudes with mesmerizing displays of light, in exchange for which they will slowly hand over their entire retirement accounts. A coin-slot switch: