Trigger on animation set

I am using King Pommes Death Star Prop Pack : https://steamcommunity.com/sharedfiles/filedetails/?id=1518614446

and I am using a prop from that prop pack that has the following Sequences :

idle

open

close

In may map, I have one trigger block expanding from the front of the prop to the other side, and the prop is "prop_dynamic"

I don't know how to make the Trigger work so that if a player walks or touch it, it opens the door (aka plays the open animation) then it close (plays the close animation) whien the player leave the trigger block, and after the close animation is finished it sets it self back to idle, please help!