Graph, Cluster and Node Gradients

digraph G { bgcolor="purple:pink" label="agraph" fontcolor="white"
fontname="Helvetica,Arial,sans-serif"
node [fontname="Helvetica,Arial,sans-serif"]
edge [fontname="Helvetica,Arial,sans-serif"]
  subgraph cluster1 {fillcolor="blue:cyan" label="acluster" fontcolor="white" style="filled" gradientangle="270"
		node [shape=box fillcolor="red:yellow" style="filled" gradientangle=90]
		anode;
	}

}