Do you do Haiku?

*wonders how to do a Haiku*

Hmm...

Secluded, the air's breath
beats upon a window
The cold light of dawn
 
Okay, we need to get back on track here.

Japanese haiku have been traditionally composed in 5-7-5 syllables. When poets started writing English haiku in the 1950's, they adopted this 5-7-5 form, thinking it created a similar condition for English-language haiku. This style is what is generally considered "traditional" English haiku.