Instructions: Click on any light to switch it off; as the wires are crossed, the adjacent lights on the left, right, top & bottom will switch their
state as well.
<a href="http://www.funpuzzlesgames.eu/index.php?og=Crossed+Wires%3E%3E%3E%3E33ef212af146b06a&ogc=Puzzles" target="_blank">Crossed Wires</a>