LIGHTS:
INTELLIGENT GAME

THE PURPOSE OF THE GAME

You have to turn all 25 "lights" on.
Clicking a square will toggle its light
(as well as the lights of all horizontally
and vertically adjacent squares) on and off.

MARK THE JAVA OPTIONS
OF YOUR BROWSER

At first, click: TOOLS; at second, click: ADVANCED;
and finally search and mark there the JAVA options
in the floating scrolling menu that will appear.