My poem above uses Cynghanedd Sain (sonorous or chiming consonance), that is, treating each stanza as a single line: this involves three elements, the first two rimed (end-words of L1 and L2 in each stanza above), and the 3rd (2nd word of L3 in each stanza above) repeating the consonants of the 2nd. Cynghanedd Sain is described here:
http://allpoetry.com/column/2348659 (scroll 2/3 to ¾ of the way down)
A four syllable line each stanza can be of three, four or five lines a..a..a..B.
The next stanza rhymes the similar c..c..c..B.The rhyme could change for the next
stanzas. We end up with a pattern thus:
x x x a
x x x a
x x x a
x x x B
x x x c
x x x c
x x x c
x x x B
I have used but three lines in the example below.
My poem above uses Cynghanedd Sain (sonorous or chiming consonance),
which links the last syllable of L2 to the 2nd Syllable of L3.
that calls for consonant rhyme, but in the last line I stepped it up to full rhyme,
not knowing if this might be forbidden. (It fit too well to ignore.)