digraph G {bgcolor=blue

  subgraph cluster_1 {
    fontcolor=white
    node [style=filled fillcolor="bisque:brown"]
    n27 [shape = "polygon" ]
	n26 [shape = "oval" ]
	n25 [shape = "egg" ]
	n24 [shape = "trapezium" ]
	n23 [shape = "parallelogram" ]
	n22 [shape = "house" ]
	n21 [shape = "octagon" ]
	n20 [shape = box  ]
	n19 [shape = "circle" ]
	n18 [shape = "diamond" ]
	n17 [shape = "ellipse" ]
	n16 [shape = "hexagon" ]
	n15 [shape = "invtriangle" ]
	n14 [shape = "pentagon" ]
	n13 [shape = "rect" ]
	n12 [shape = "septagon" ]
	n11 [shape = "triangle" ]
	n10 [shape = "rectangle" ]
	n9 [shape = "square" ]
	n8 [shape = "doublecircle" ]
	n7 [shape = "doubleoctagon" ]
	n6 [shape = "tripleoctagon" ]
	n5 [shape = "invtrapezium" ]
	n4 [shape = "invhouse" ]
	n3 [shape = "Mdiamond" ]
	n2 [shape = "Msquare" ]
	n1 [shape = "Mcircle"  ]
	x1 [shape = "note"  ]
	x2 [shape = "tab"  ]
	x3 [shape = "folder"  ]
	x4 [shape = "box3d"  ]
	x5 [shape = "component"  ]

	label = "Shape Variations";
  }
  n1 -> n2-> n3 -> n4 -> n5 -> n6 -> n7 -> n8 -> n9 -> n10 -> n11 -> n12 -> n13 -> n14 
  n15 -> n16 -> n17 -> n18 -> n19 -> n20 -> n21 -> n22 -> n23 -> n24 -> n25 -> n26 -> n27
  x1 -> x2 -> x3 -> x4 -> x5
}