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Door Auto-Close Timing Example

simple BP to show how one can use Event Controllers + a subgrid (a piston was chosen since it's more obvious what's going on, but a hinge is generally better for actual usage) to automatically close a door with a precise delay.

of course, you can just use a timer, but if you're lazy like me you probably want a shorter delay than 1 second (i.e for airlocks, having a long delay for closing is annoying)