Well if you are doing the poem on both the relationship of radius and diameter then you properly do it about the relationship. But what you asked for was a poem of diameter so then i just am doing...
Two Sunflowers Move in the Yellow Room.
"Ah, William, we're weary of weather," said the sunflowers, shining with dew. "Our traveling habits have tired us. Can you give us a room with a...
my heart it fills with joy with every sight of you,
thinkin and wishin you were here to do the things you do,
you hold me tight and say all the things to make me smile,
just hopin one day youll be...