graph graphname {
	// This attribute applies to the graph itself
	size="1,1";
	// The label attribute can be used to change the label of a node
	a [label="Foo"];
	// Here, the node shape is changed.
	b [shape=box];
	// These edges both have different line properties
	a -- b -- c [color=blue];
	b -- d [style=dotted];
	// [style=invis] hides a node.
}