Chapter 1 here.Chapter 2 here.
Chapter 3 here.
Chapter 4 here.
Chapter 5 here.
This used to be about my music Now it is just overflow from other places.
The logic of it is 51=3*17=3*( 3*3 + 2*4 )
or
I am pleased with this because it is a different generalization than the 51 state flags currently being promoted at Wikipedia. In the versions here, the idea of alternating rows of single stars is replaced with alternating rows of triples of stars. This preserves a basic symmetry that is lacking in the Wikipedia version. Also the versions here have no single star bias.