Now that I have your mask, you will die from the flu!!
Why is your hair falling out?
I don't know?
It doesn't feel too safe here...
When Rosie and her friends took Elsie's mask at the park, that was a foreshadow that she would die soon. We know this because the only way Elsie was surviving was the mask, so once it was taken from her we can foreshadow that she will die soon.
When Elsie's ghost was haunting Annie for too long, her hair started to fall out, and started to get wrinkles all over. That was a foreshadow that the ghost could no longer stayig in earth and had to go back to where she was before.
When the girls lied to their parents about going to the graveyard, it was a foreshadow that not everything was going to go as planned. Their parents probably didnt want them there, so that was a big foreshadow that something bad was going to happen.