I'm trying to use SpriteAttacher to attach a sprite "new_sword" into the "weapon" slot. At first, during animation "attack", slot "weapon" only has 1 attachment "original_sword", I can create a new attachment from "new_sword" and then attach it to slot "weapon". But now, my "attack" animation is more complicated. During first 10 frames, slot "weapon" is attached with "original_sword" and in last 10 frames, it is attached with "original_sword_2". How can attach 2 new sprites: "new_sword" and "new_sword_2" corresponding to first 10 and last 10 frames of that animation ?