First off; you will say a dare and put or else at the end of it. Then, the next person will say what or else you would do! Then, he or she would make their own dare and 'or else'. Got it? If not, then Tada!:
Person A: Make me a pie or else...
Person B: ...the world will explode.
Gimme all yo moneh, or else...
Person C: ...a fly will lay eggs in your brain.
Teach me how to draw or else...
Etc etc! I shall begin:
Make a time travelling machine or else...
