I have to write a sonnet for english?

My sonnet has to rhyme (which im not very good at) no obscence language. i have to read it infront of the class! i have to somehow pull in 3 charachters from romeo and julite, and/or to kill a mocking bird. 3 words per line. please dont write this for me, can you just give me some tips exampels, ect? greatly appreciated! thanks in advance(: