The Haiku has very simple rules:

1)use no more than 17 syllables

2)arrange them in 5-7-5 syllable form

3)avoid similies and metaphores

4)try to retain Japanese value

Here are four samples of Basho:

old pond

frog jumps in

splash

waterjar cracks;

I lie awake

this icy nite

Lightning;

Herons cry

Stabs the darkness.

sick on a journey

over parched fields

dreams wander on.

These were just a few of the many poems available. To see what I mean just CLICK.