FLINE is the color and fill type to be used for contour fill:
The number of fill colors and types needed is one greater than the
number of fill levels in FINT. The number of fill colors may be
entered as a list of color numbers separated by semicolons or a
range of colors. The number of fill types may be entered as a list
of numbers separated by semicolons. More information on color
selection can be found in the help for COLORS.
The fill type may be set any of the following values:
2 Slanted Dash
3 Wide-spaced Slanted Line
4 Medium-spaced Slanted Line
5 Zig-Zag Line
7 Thin-spaced Slanted Line
If fill type is set to 0, soild fill is used. If the fill type is
set to a single negative number, negative values will use the
absolute value of the fill type, and positive values will be solid.