So first, take a sheet of paper. I took some blue paper, folded it, and cut it in half.
Then fold it in half to make a hot dog.
Again, fold it in half, then back again.
Then, take one side of the paper and fold it up. Do the same to the other side.
After you're done, it should look like this.
Then turn it around to show the other side.
Then, fold down the top of your bookmark.
After, fold down the top corners.
Then finally, flip it around and put it on the corner of a page of your book!