mgrib(grib_field_position = 1,
grib_input_file_name = "700_hPa_divergence.grib")
mcont(contour_level_selection_type = "level_list",
contour_shade_colour_method = "list",
contour_shade_method = "area_fill",
contour_shade = "on",
contour_level_list = [-200.00, -100.00,...,100.00, 200.00],
contour_hilo = "off",
contour = "off",
contour_highlight = "off",
contour_label = "off",
legend = "on",
contour_shade_colour_list = ["rgb(0,0,0.3)", "rgb(0,0,0.5)",...,"rgb(0.5,0,0)", "rgb(0.3,0,0)"])