We were listening to music while the lights went off;The lights went off when we were listening to music.
3)I lost my keys while I was running on the beach; I was running on the beach when I lost my keys.
4)Somebody stole my bag while I was talking to my friend; I was talking to my friend when somebody stole my bag.
5) Danny called while you were taking the dog for a walk; You were taking the dog for a walk when Danny called.
6)I was getting ready for the beach while it started to level; It started to level when I was getting ready for the beach.