How can I scare my people with this scary story?

I trying to scare people about a ghost story about a couple name Johnny and Jess. They made a song together. One day a girl name Lisa (Johnny's ex) killed Jess in the school bathroom. Johnny got killed by bullies in the school. No one heard about them but people say that Jess's spirit is haunting the girl's bathroom. Some say if you find the song with drops of blood it becomes curse. And Jess will find you. Other say Johnny and Jess fights when it rain (it makes some circle with the clouds with lighting).How can I make a prank with this story?