Structure of haiku?

The haiku was originally Japanese, and still is, but it's common in English. A haiku usually has 3 lines with syllable patterns-575 or 353. Haikus are hard to do in English, but if you think creatively, you might get a really good one.

The syllable pattern doesn't translate from Japanese to English, and there is a degree of freedom in this. Brevity and precision are vital. The three line structure should have two observations or ideas. The second line both links them, and separates, so that the appearance is of two poems of two lines each. Rhyming first and third lines are not obligatory.