import gdsfactory as gf
c = gf.c.nxn(
    xsize=600,
    ysize=200,
    north=2,
    south=3,
    wg_width=10,
    layer="M3",
    port_type="electrical",
)
cc = gf.routing.add_pads_bot(component=c, port_names=("e1", "e4"), fanout_length=50)
cc.plot()