security

mon = peripheral.wrap('top')
mon.clear()

function drawNumPad(x, y)
	mon.setCursorPos(x,y)
	xstart = x
	ystart = y

	for i = 1, 9, 1 do
		mon.write(" "..i.." ")
		if i % 3 == 0 and i ~= 0 then
			y = y + 1
			x = xstart
		end
		x = x + 1
	end

	mon.setCursorPos(x+1, y+1)
	mon.write('0')

end

drawNumPad(2,2)

repeat

	drawNumPad(2,2)

	input = os.pullEvent()


while input ~= 'key'