The haiku is a Japanese verse in three lines. Line one has 5 syllables, line two has 7 syllables and line three has 5 syllables. Usually haikus are about nature. They do not rhyme and do not have metaphors or similes.
Old crow in command
Always foraging for food
On his daily route
A color riot
Lilac bush bursts into bloom
A splash of flowers
Ink black night cover
A wrapper of soft silence
Our way lit with stars
Water slaps the shore
Against the white crystal sand
Under a hot sun
More examples: Haiku examples