A poem with fourteen lines and a mixed rhyme scheme is a "sonnet." Sonnet is a rhyming poem of fourteen lines. It was invented in Italy in the 13th century. First English sonnets were written in the 16th century. Sonnets are a kind of poetry. There arem two main types of sonnets are the Italian (petratchan) sonnets and the English (Shakespearean) sonnet.
Metaphor; its showing how that rack was moving alot-something like how a teeter totter would look had someone been playing on it. it was comparing the rack to a teeter totter