The Non Linear Action Editor ( NLA ) - Blender 3D ( 3 ) Add a strip

Introduction - The strip - Using strip - Advanced options -

Select the action you want to assign a strip to and press SHIFT+A. A copy of the current NLAstrip appears below the previous one, it's parameters reset to default, whatever the previous NLAstrip data could have been. Let's select the upper strip and set it's values to: Strip Start:1 Strip End:50 Action Start:1 Action End:100 Repeat:1 Hold: Selected Then select the lower strip and set values to: Strip Start:100 Strip End:150 Action Start:100 Action End:1 Repeat:1 Hold: leave unselected In the resulting animation, action will play entirely between frame 1 and 50, hold from frame 50 to frame 100 and then play reversed from frame 100 to 150.