I am sure way back when they had set ways to make them --- but you can make them anyway you want :lol:
Here is a short history , but it makes no mention of the "rules " :wink:
http://www.patternsfromhistory.com/c...wer_garden.htm
This one explains some of the background color thinking
http://www.womenfolk.com/quilt_patte...ory/mosaic.htm
White was a picket fence, green was the garden path
Just have fun