def plot_teq(fignum, araiblock, s, pars):
    """
    plots directions  of pTRM steps and zero field steps

    Parameters
    __________
    fignum : figure number for matplotlib object
    araiblock : nested list of data from pmag.sortarai()
    s : specimen name
    pars : default is "",
        otherwise is dictionary with keys:
        'measurement_step_min' and 'measurement_step_max'

    Effects
    _______
    makes the equal area projection with color coded symbols
        red circles: ZI steps
        blue squares: IZ steps
        yellow : pTRM steps


    """
    first_Z, first_I = araiblock[0], araiblock[1]
# make the stereonet
    plt.figure(num=fignum)
    plt.clf()
    ZIblock, IZblock, pTblock = [], [], []
    for zrec in first_Z:  # sort out the zerofield steps
        if zrec[4] == 1:  # this is a ZI step
            ZIblock.append([zrec[1], zrec[2]])
        else:
            IZblock.append([zrec[1], zrec[2]])
    plot_net(fignum)
    if pars != "":
        min, max = float(pars["measurement_step_min"]), float(
            pars["measurement_step_max"])
    else:
        min, max = first_I[0][0], first_I[-1][0]
    for irec in first_I:
        if irec[1] != 0 and irec[1] != 0 and irec[0] >= min and irec[0] <= max:
            pTblock.append([irec[1], irec[2]])
    if len(ZIblock) < 1 and len(IZblock) < 1 and len(pTblock) < 1:
        return
    if not isServer:
        plt.figtext(.02, .01, version_num)
#
#   put on the directions
#
    sym = {'lower': ['o', 'r'], 'upper': ['o', 'm']}
    if len(ZIblock) > 0:
        plot_di_sym(fignum, ZIblock, sym)  # plot ZI directions
    sym = {'lower': ['s', 'b'], 'upper': ['s', 'c']}
    if len(IZblock) > 0:
        plot_di_sym(fignum, IZblock, sym)  # plot IZ directions
    sym = {'lower': ['^', 'g'], 'upper': ['^', 'y']}
    if len(pTblock) > 0:
        plot_di_sym(fignum, pTblock, sym)  # plot pTRM directions
    plt.axis("equal")
    plt.text(-1.1, 1.15, s)
plots directions  of pTRM steps and zero field steps

    Parameters
    __________
    fignum : figure number for matplotlib object
    araiblock : nested list of data from pmag.sortarai()
    s : specimen name
    pars : default is "",
        otherwise is dictionary with keys:
        'measurement_step_min' and 'measurement_step_max'

    Effects
    _______
    makes the equal area projection with color coded symbols
        red circles: ZI steps
        blue squares: IZ steps
        yellow : pTRM steps