All this works totally fine, but I have multiple instances of this Door/TriggerBox duo around my game; how do I make the event target the singular object that the character opens instead of all of them. At the minute, I'm testing it with two buildings that both use the Door sprite and invisible TriggerBox sprite for said door. But when I walk through one of them, it changes the animation frame for both doors.

The "Animation frame = 0" is just to make sure the door stays open when opened.
I thought that the "For each" event would actually do this, but I guess not. Any help would be greatly appreciated, thanks!