A cinquain has five lines and a quatrain has four lines. The only other rule for a quatrain is that it must rhyme. The pattern of rhyming is up to you.
Here is a simple example of a quatrain with an abab rhyme scheme:
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King Cole rules the hall
The kids all run in fear
He shouts at them all
Whenever he gets near.
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Other possible rhyme schemes include aabb, abcb, and abba. You are not limited to just these rhyme schemes. You can be as creative with your rhyme pattern as you want.
Try some of your own and post them in comments.
Ol' King Cole's Castle 
There was a guy called Shaggy Beard
Who was so crazy and weird
He wanted to marry a 12 year old
When he is so ugly and cold
Although rat may come
We all may have to run
This game of chase will be fun
Until the rat ends up biting some.
A kid is on the run
Chased by the police
He kills them with his gun
And is waiting for his release
The boy stood in the hall
Trying to find his ball
He couldn’t find even though he tried
So he sat down and started to cry
There was a dude
Who ate lots of food
He ate some wasabi pie
and then he started to cry
There was a dude called Paul Nam,
Who liked to eat chinese Dim sum.
When someone asked why,
He said” Go die!”
Jeffrey owns the rainbow,
but sometimes he hurts his toe.
He can really shoot,
with the end of his boot.
Juniper has all the zits.
He plays the drum kit.
His friends say he is funny.
His wallet is never has any money.
I slipped on the ice
Afraid of the lice
But sadly i had all mouse
that chased me all over the house
There once was a peasant named Jane,
who was thrown down the sewers,
her skirt went down the drain,
and her thumb went to the baker’s.
Birdy was engaged to Shaggy Beard.
He died with no warning,
No one was mourning,
And Birdy got out of the marriage she feared.
Writing a limerick is hard,
But once you know it’s fine.
However, if you’re off guard,
The lines will not shine
There was a Korean dude,
who always had a mood.
When someone watched brain pop,
he went to eat bibimbop.
Birdy, running away from the future,
she thinks her life was in torture.
She couldn’t stand it anymore,
and wanted to escape even more.
there once was an overemotional guy
who’s only solution for problems is to cry
he sadly decided to go to a shrink.
and now instead of crying he drinks.
There was a guy who was odd,
In the bus he always played COD.
When he got busted by bus monitor,
She somehow got stabbed by a crusader.
There once was a guy called John
Who was playing chess with Luke
He moved one of his pawn
Which took his Rook.
I’m a dino hear me roar,
I jump up and down in the store.
Whenever the owner comes to kick me out,
I always run away and call him a trout.
There was a guy
He thought he couldn’t die
He jumped off a shed
Now he’s dead
A scared convict escaped from jail
And many police were on his tail.
He was so frightened by the law
He killed himself with a chainsaw.
Parker was scared of the mall
So he stayed outside
And played baseball
But never went inside
In a deep dark night
Somebody was mourning
It was the bravest knight
Just waiting for the morning
There once was a guy
Who loved to lie
One day he got caught
And in detention he fought
After the fall of Rome
People forgot their way home
Not only that but everything else to
All they remembered is cows go Moo
There was a fierce, brave knight.
With a sword that shone in the light.
He fought to protect the king.
And was granted a gold ring.
There once was a dude
he was so rude
he saw a old man
and called him a ram
The Rome Empire was really mean,
People shout, “How mean they had been”.
The Rome Empire said, “Kill them, hit them, and wipe them out”,
People cried and run without doubt.
Fear can affect you
when people make you do something you don’t want to
because you worry what they might say
so you follow their own malicious way
I bought a shiny pen
But I dropped it on the ground
And broken by naughty Ben
So I quickly chased him around
The king is the top lord
Barons make the rules
Knights fights with swords
Peasants farm with the their tools
There was once a girl called Catherine
But people called her Birdy
She loved to get dirty
To look scary for the suture
Macbook is awesome and cool.
But don’t bring it to the pool.
I really warn you seriously.
You are gonna cry so sadly.
There once was a girl in the Middle Ages,
Who liked to keep her birds in cages,
She was betrothed to a hairy, fat pig,
So to avoid it, she disguised herself with a wig
Quatrain
There are social structures In every medieval town
But not all towns have a clown
The King is at the top
And the serfs handle the pots.
Quatrain
Of course the king is the best
Barons rule so many manors
Knights want to earn some honors
And peasants wait for the harvest