This section describes the format and semantics of the animations files produced by sfn.

• One command per line.
• Tokens are separated by a single space.
• The first token on each line is a single character that indicates the command.
• n is the current number of nodes in the network. It is up to the implementor to keep track of this.

F

Marks the start of a new frame.

I [num]

Add the initial [num] nodes. The IDs of these nodes are 0, ..., [num] - 1. Use [num] to initialise n.

R [i] [j]

Add an initial random link between the [i]th and [j]th node.

A

Add a new node, its ID is n. Remember to increment n after assigning the ID to the new node.

L [i] [j]

Add a new link between the [i]th and [j]th node.

C [i] [colour]

Set the colour of the [i]th node to [colour]. [colour] can be a common colour name, for example, red.

E [i] [j] [colour]

Set the colour of the edge between [i]th and [j]th node to [colour] can be a common colour name, for example, green.