A haiku is an un-rhymed verse genre. Haiku has five syllables in the first line, seven in the second, and five again in the third. In Japanese, the word "haiku" means "playful verse." Haiku should use objective sensory detail. Use imagery to write the Haiku, in order for the reader to visualize what you are writing. It's great exercise for the brain.
Snow pelts the windows
winds howl around the dark trees
I crawl back to bed.