Simple rules.
The poem starts with the first person...one syllable
Line two has two syllables AND has to start with the next letter from which the last line started...for example...
All
Better
Can breathe now
Don't let me fall
Every feeling
Flowing from my furl'd brow
Going through my body now
Once you feel that the poem is finished, you can start again, but you still have to follow the 'alphabetic' rule. Each person only adds one line.
Starting the next poem with 'H'...
How