Film Title

When I was a young kid I remember seeing a movie at the drive in with my parents. All I really remember about it is that a group of college students go to a cabin and start telling stories. The stories are shown as they are told with the students each playing a part in the stories. One was about a man who went crazy looking at a green light. The other all I remember is people calling a girl "Spooky Jooky". At the end of the movie a big black shadow covers the cabin, and that is all I remember. It had to have come out in the last 70's or really early 80's. If anyone know this movie and could tell me the title I would appreciate it. It has bugged me for years!

Thanks