function cjrcle(r, x, y)
    for dtheta = math.pi, 0, -math.pi/512 do
        love.graphics.line(r*math.cos(dtheta) + x, r*math.sin(dtheta) + y, r*math.cos(-dtheta) + x, r*math.sin(-dtheta) + y)
    end
end