Without more context, it is impossible to determine what you were scared of. However, based on the search results, "What Was I Scared Of?" is a book by Dr. Seuss that tells the story of a character who repeatedly meets up with an empty pair of pale-green pants. The book is a spooky and silly story about facing your fears and is beloved by readers of all ages. There are also several read-aloud versions of the book available on YouTube.