An Etheree is a poetic form, that comprises ten lines, with syllables in each tapering down from ten to one, or moving up from one to ten.
Here's a etheree for the Night...
Endless blue stretching to realms unknown
shining stars dancing in the darkness
bright moon spreading the yellow glow
cool breeze filling the night air
leaves singing in the wind
scent of small buds
dip my soul
UBC 16 , for me ! :-)