The night was long,
The morning cold,
While trees whispered a song,
The story was told.
A story about laughter,
About love, and happily ever after,
A story about people, their actions,
And their distractions,
As the young girl listens in the tall weeds,
She thinks and ponders about all of her needs
She wants love and happiness too,
But cannot decide what she must do.
She goes home with the stories in her head,
As she is thinking what to do, she lays down for bed,
Until the morning she sleeps on the grass in the dew,
Hoping that in the morning all her dreams will have come true.

A couplet  is simply pairs of lines that rhyme. 

Upon Prue, His Maid
In this little urn is laid
Prudence Baldwin, once my maid,
From whose happy spark here let
Spring the purple violet.

  Dreams
Here we are all, by day; by night we're hurled
By dreams, each into a separate world. 

The Triplet is a seldom-used variation on the couplet. 

When e'er in silks my Julia goes,
Then, then, methinks, how sweetly flows
That liquifaction of her clothes.

Next, when I cast mine eyes and see
That splendid vibration each way free,
Oh, how that glittering taketh me!

   Robert Herrick