@gellemeelle,
gellemeelle wrote:could this have been a satanic ritual?
Not likely, at least in the sense of an actual contact with the lord of evil (or whatever the proper satanic title is).
Most likely it was a bunch of kids goofing off.
But Jespah was right about counseling. You should see a doctor about your depression. It can be cured, but that cure won't happen until you see a doctor.