Help!

[purplecowmoo]

For English class, I have to write a sonnet as a response to Shakespeare's Sonnet 130, me being the 'mistress' he is writing about.

This is the sonnet:
My mistress' eyes are nothing like the sun;
Coral is far more red than her lips' red;
If snow be white, why then her breasts are dun;
If hairs be wires, black wires grow on her head.
I have seen roses damask'd, red and white,
But no such roses see I in her cheeks;
And in some perfumes is there more delight
Than in the breath that from my mistress reeks.
I love to hear her speak, yet well I know
That music hath a far more pleasing sound;
I grant I never saw a goddess go;
My mistress, when she walks, treads on the ground:
And yet, by heaven, I think my love as rare
As any she belied with false compare.

Does anyone have any ideas? I've been sitting at my desk for almost an hour now, with a severe case of 'writer's block'.