// gen_swimmers --poly=-7,-27:6,-56:78,-23:66,7 --swimmers=5 --sep=20
poly = pts={-7,-27:6,-56:78,-23:66,7}
swimmer = name=p01, x=21.6, y=-23.4
swimmer = name=p02, x=70.7, y=-14.1
swimmer = name=p03, x=-1.5, y=-24.87
swimmer = name=p04, x=13.7, y=-47.25
swimmer = name=p05, x=33.96, y=-41.26