I'm going to create a SMB1 custom level and I want to put in this level, scale platforms (When Mario stand on one platform out of 2, this platform is falling while the other one is raising and vice-versa) but I don't know which layers and events or scripts are requiered to make this mechanism working like classic SMB1 levels with these scale platforms.

By the way, I know there's backgrounds for this mechanism, added in SMBX 1.4.4 (38A) and this is the reason why I want to use scale platforms.
Can you help me if you know how can I do make this ?
