It's probably best for you to write one yourself, in a more personal sense but there is a specific rhyme scheme Shakespeare used in his sonnet. That scheme had fourteen lines and the rhyming went like this, (in sense of variables),
ABAB BCBC CDCD EE.
A good example would be something like this:
My frog (A)
A bowl (B)
My dog (A)
A mole (B)
Some coal (B)
A scene (C)
His role (B)
He's mean (C)
A dean (C)
That twig (D)
A bean (C)
A fig (D)
A mouse (E)
The house (E)
Hope this helps! :)
If you have any more questions about Shakespeare ask away
