This experimental poetry form is called Three Rhymes Per Line. The form has five lines in one stanza. In each line, three words must rhyme with each other. Each line has a different rhyme. There are no other restrictions on the lines. Here is a poem written in the form (for illustration, the rhymes in each line are in italics):
Something old made of gold was sold,
it was found above the ground despite no sound,
and on that day in a quick way this one did pay,
and got the thing that was a ring and then did sing,
for a small cost they found what was tossed and had been lost.