*	Drawing the grid has been moved to the Paint event where all the drawing will be handled.
*	Drawing has been restricted to the damaged regions only.
*	Grid colors has been changed to something more visible temporarily, to see if everything works fine.
*	For debugging purposes, the background colors change circularly.
*	We also log the coordinates on the console for debug purposes until everything will work correctly.

TODO
*	Simplify the calculation of the first grid line coordinates.