digraph {
	label = <Label <font color='red'><b>formating</b></font>,<br/> test <font point-size='20'>is</font> done<br/> here <i>now.</i>>;

	node [shape=box]
	rankdir=LR
	margin=0.1
	a->b

	// http://www.graphviz.org/doc/info/colors.html
	// note: style=filled!
	node [shape=box colorscheme=paired12 style=filled]
	margin=0.1
	a2[fillcolor=1]
	b2[fillcolor=3]
	a2->b2->x2

	// http://www.graphviz.org/doc/info/colors.html
	// note: style=filled!
	node [shape=box colorscheme=paired12 style=filled]
	rankdir=LR
	margin=0.1
	c1[fillcolor=1]
	c2[fillcolor=2]
	c3[fillcolor=3]
	c4[fillcolor=4]
	c5[fillcolor=5]
	c6[fillcolor=6]
	c7[fillcolor=7]
	c8[fillcolor=8]
	c9[fillcolor=9]
	c10[fillcolor=10]
	c11[fillcolor=11]
	c12[fillcolor=12]
	c->{c1 c3 c5 c7 c9 c11}
	c1->c2
	c3->c4
	c5->c6
	c7->c8
	c9->c10
	c11->c12
}