Freddy laughs every time she moves. So:
First laugh: She's moved to the bathrooms
Second laugh: She's moved to the dining room
Third laugh: She's moved backstage
Fourth laugh: She's moved to the closet
Fifth laugh: She's moved to the kitchen and is ready to attack.
Sixth laugh: She's moved back to the closet.
I've never seen her move more than 6 times but if she did she'd presumably just move back and forth between kitchen and closet.
As for Foxy, she drains 3/6/9/12% for her attacks, increasing each attack. If she attacks you a full four times, that's 30% power lost just to Foxy, and you can still win even with that kind of drain.