Before I begin, a word about these poetic forms, I know they are hard. I'm sure you feel the precise, measured meter and rhyme constricts your ability to express yourself. But please hang in there and keep practicing. Beneath the surface, these exercises help you to gain control over your language. Instead of the words seeming in control, pensive and unpredictable, you'll gain dominance over them, learning to sling them around any way you wish, despite their cries for mercy...oops, got carried away there.  lol. Well, anyway, the exercises will solidify your poetry. Now on to the septet:

A septet is a seven-line poem with the following number of syllables per line, no rhyme. 3, 5, 7, 9,7, 5, 3. 
 

An example: