plpsty: Select area fill pattern 

DESCRIPTION:

    Select one of eight predefined area fill patterns to use (also see
    plpat). 

SYNOPSIS:

plpsty(n)

ARGUMENTS:

    n (PLINT, input) :      The desired pattern. Pattern 1 consists of
    horizontal lines, pattern 2 consists of vertical lines, pattern 3
    consists of lines at 45 degrees angle (upward), and so on.