The cave of time(Your own adventure)

You are lost in a strange, dimly lit cave. Graduaily you can make out two passageways. One curves downward to the right; the other leads upward to the left. It occurs to you that the one leading down may go to the past and the one leading up may jo to the future. If you take the left branch, turn to p...0. If you take the right branch, turn to p.61. If you walk outside the cave again, turn to p.21.
What happens next in the story? It all depends on the choices you make. How does the story end? Only you can find out! And the best part is that you can keep reading and rereading until you've had not one, but many incredibly daring experiences!