You forgot to connect the Update pin to the SetRotation node for the second timeline.
Both timelines need to be 1 second (or whatever) long, opening should go from 0 to 90, closing (bottom timeline) should go from 90 to 0.
You forgot to connect the Update pin to the SetRotation node for the second timeline.
Both timelines need to be 1 second (or whatever) long, opening should go from 0 to 90, closing (bottom timeline) should go from 90 to 0.