I'm trying to visualize what the back of the quilt would look like. That's a great question!!
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I love Crazy Quilting, but did find out early that I had to match the
color of the bobbin with the quilt backing. With the top colors, I usually
stitch in one place at beginning and end of the line, then lift the needle and
go to the next line where I wanted that color. When I was finished with that
color, I can change the top color, clip off the unwanted strings, then start
again. With each color change I can change the stitch width and shape, it
almost looks like I had done it by hand over a long time!