This composition was explicitly based on the Confederate flag.
I was thinking of what John Szarkowski wrote in the introduction
to William Eggleston's Guide:

When Alfred H. Barr, Jr., first saw a selection of slides from
this series in 1972 he observed - surprisingly but in fact accurately
- that the design of most of the pictures seemed to radiate from a
central, circular core. In time the observation was relayed to Eggleston,
who replied, after a barely perceptible hesitation, that this was true,
since the pictures were based compositionally on the Confederate flag
- not the asterisk, or the common daisy, or the dove of the Holy Ghost,
but the Confederate flag. The response was presumably improvised and
unresponsive, of interest only as an illustration of the lengths to which
artists sometimes go to frustrate rational analysis of their work,
as though they fear it might prove an antidote to their magic.