The Seguidilla began as a popular dance song of Spain. The verse form was established and branched into variations by the 17th century. It has an alternating long short rhythm.
The Seguidilla is:
• stanzaic, written in any number of 2 part septets. (7 lines)
• syllabic, 7-5-7-5 : 5-7-5 per line. There is a slight pause between L4 and L5 suggesting L4 should be end-stopped.

DECLINE
Reflections, green among blue,
Fluid illusion.
Hidden like lost cognizance,
Present once, now gone.
Might she strike in time?
The unsuspecting victim
May not remember.
Poetry Form: Seguidilla | dVerse (dversepoets.com)