i find one solution that is similar
, i. l+ | m$ v, U6 O# B公仔箱論壇but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....tvb now,tvbnow,bttvb1 g% C3 R% `( D9 @+ @7 t" F6 b, U
maybe there is a better one, let me see sin |