gEDA-user: 4-bit_12-LED.png (PNG Image, 1024x768 pixels)

[DJ Delorie]

The rule is: Lines that cross without a dot are not connected.  Lines
that cross with a dot are connected.  No arcs are required.

A three-way connection is, obviously, connected.

Note: avoid connecting more than one net at the end of a pin; whether
you get a dot or not - and whether there's a connection between the
two nets or not - is ambiguous in that situation.