To be frank, wolfstorm, I have never thought that Stephen King's books were all that great. Good grief. I have never learned to post pictures. Perhaps you can give me a clue.
A limerick is a patterned poem that follows a particular rhyme scheme.
Example:
There once was an eminent preacher,
Who said to a hen, "My dear creature".
The hen, just for that,
Laid an egg in his hat,
And thus did the hen reward Beecher.
Notice that the two words at the end of lines one and two, rhyme. (preacher and creature) Those words are labeled AA. Also notice the next two lines have a different rhythm and the words that and hat rhyme. We call those BB. Finally the last line has the rhythm of the first two lines and the last word rhymes with preacher and creature Back to A again.
So the rhyme scheme of a limerick is aa bb a.
The rhythm is quite important because the stressed syllables must follow a pattern.
There ONCE was an EM i nent PREACHer
who SAID to a HEN my dear CREAture..
Hope this helps.