You start with 3 energy.
There are 3 types of fuel for the fire.
Twigs, Branches and Dung.
Twigs take 1 energy and add 1 fuel
Branches take 2 energy and add 2 fuel
Dung takes 4 energy and adds 5 fuel
Each round you can either:
Rest which adds 2 energy
Add a fuel (twig, branch or dung)
Or Stike a Match
When to strike a match you have a 50% chance using random.org of lighting it
When you light your fire you have 20 options in random.org. To begin with all are no but for your fuel value that amount of yes are added to the list. E.g. If your fuel value is 5, the list will contain 20 no's and 5 yes's
Get a yes and you win the challenge.
A no and your fire goes out not burning through the rope.
If you're fire goes out you keep the same fuel value but must relight a match to try again.