:start shape:

    library = egs_shape_collection

    :start shape:
        library = egs_extended_shape
        :start shape:
            library = egs_circle
            radius = 0.02
        :stop shape:

        extension = -0.19 -0.12
    :stop shape:

    :start shape:
        library = egs_extended_shape
        :start shape:
            library = egs_circle
            radius = 0.02
        :stop shape:

        extension = 0.12 0.19
    :stop shape:

    probabilities = 1 1

:stop shape: