    // cartesian coordinates plotting area

    // define the area
    #proc areadef
    xrange: -10 10
    yrange: -10 10

    // do the blue grid..
    #proc xaxis
    ticincrement: 1
    grid: color=gray(0.8)
    ticlen: 0

    #proc yaxis
    ticincrement: 1
    grid: color=gray(0.8)
    ticlen: 0

    // do the axes..
    #proc xaxis
    location: 0(s)
    stubs: inc
    stubomit: 0

    #proc yaxis
    location: 0(s)
    stubs: inc
    stubomit: 0