You could have a look at making a montage from the open animation. Then you just hit Montage Play and use the Play Rate nodes to adjust it (i.e. 1 closes, -1 opens, 0 pauses).
You could have a look at making a montage from the open animation. Then you just hit Montage Play and use the Play Rate nodes to adjust it (i.e. 1 closes, -1 opens, 0 pauses).