If all of this translation from one medium to another and back again seems a bit bizarre, here is a related but more practical writing assignment virtually guaranteed to produce poignant poems. It smells like . . . . It tastes like . . . . Ideas are presented in the order in which characteristics are likely to be noticed as proximity to an object increases. Using the noun rather than the pronoun in the first and last lines establishes a good precedent for all introductions and conclusions.
Resentment is gray.
It sounds like a tornado that has already passed. It smells like a smoldering fire. It tastes like dust. Resentment feels like an emptiness inside me. Each A represents the same letter, each B represents the same letter, etc.