# default coordinates of the left up arch
v_arc_left_up()
# default coordinates of the right up arch
v_arc_right_up()
# default coordinates of the left down arch
v_arc_left_down()
# default coordinates of the right down arch
v_arc_right_down()
# default coordinates of the left up arch
h_arc_left_up()
# default coordinates of the right up arch
h_arc_right_up()
# default coordinates of the left down arch
h_arc_left_down()
# default coordinates of the right down arch
h_arc_right_down()
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