How to work?
	To see how the pattern develops, click
	GO down below all the instructions.
	Read the instructions on each page carefully.
	Then click START.
	Type the answer for the given addition in 
	the empty box. If required, change the answer
	by deleting the earlier one.
	Then click OK.
	Read the message you get.
	When finished follow the other instructions
	given.
	
	Remember, if you click Cancel you will lose
	the chance of checking correctness of your
	answer.
	When you click 'Show  Table ...', a new
	window will open for you. It can be closed by
	just clicking the 'x', in its top-right-corner.

	So, enjoy here!