With SAS 9.2, colors and patterns (or symbols) cycle through the lists for each group. So, first group value gets first color and first pattern, second group gets second color and second patter, and so on till you run out of the 11 patterns. Then, group #12 gets 12th color and 1st pattern, and it continues.. If you want more colors, define more GraphData elements beyond 12 without any gaps in the color value. If instead you want to hold the color constant, that is easy, just specify the color in the LINEATTRS option.
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