Long origami heart bookmark instruction and tutorial Step 16:Fold both left and right edge to the center line.Step 17:Make inside reverse folds on the dotted line.Step 18:Make inside reverse folds on the dotted line.Step 19:Turn back.Step 20:Fold backwards along the dotted to form a heart shape.Step 21:The long origami heart bookmark is done.Pages: 1 2 3