function love.load()
	m = {x = 0, y = 0}
end

function mouse()
	if mx < m.x then
		return -1
	elseif mx > m.x then
		return 1
	end
	
	return ''
end

function love.update(dt)
	mx, my = love.mouse.getPosition()
end

function love.draw()
	love.graphics.print(mouse(), 10, 10)
	m.x = mx
end