I’m a beginner at Senryu and in addition to Margaret’s great links, found this link helpful:
Haiku or Senryu? How to Tell the Difference.
I followed the syllable count but switched the lines. Here’s my first stab at it:
Hot packed waiting room
Doctor gives bad news
How lovely is the sunshine
annewestlund
feywriter
lin52
Margaret Fieland
Margaret
Michele
Poetic Muselings 
Written by lin52
Comments Off on Lin’s Senryu