function Left(n)
    if n < 0 then
		Right(math.abs(n))
	else
		print ("go left " .. n .. " spaces")
	end
end

function Right(n)
	if n < 0 then
		Left(math.abs(n))
	else
		print ("go right " .. n .. " spaces")
	end
end

Left(1)
Left(-10)

Right(2)
Right(-20)