Could you be thinking of a 'formula' poem, which is a poem made up of only two words per line, and the poem must tell a story from beginning to end?
eg
Headache
My headache
Beating hard
Hurts bad
Not fun
Sinus pressure
Stressing out
Pain reliever
Sleep forever
Morning comes
All better
Maybe later
After school
More stress
Not again!
Stupid headaches!