LightOn

This applet is a small game. The purpose is to highlighte all the squares at the same time by clicking and clicking...

Squares width :   Set the dimension of the board. For instance, if you enter 4 then  the board size will be 4x4. If you leave this field blank then the size will be adjusted to fit the applet dimension.
Off square color :   The color of the not highlighted squares.
On square color :   The color of the highlighted squares.