digraph overview {
	subgraph cluster0 {
		style = filled;
		color = lightblue;
		node[style = filled, color = white, fontname = Arial;];
		d;
		i;
		l;
	}
	label = "Flicker Overview";
	fontname = Arial;
	fontsize = 20;
	labelloc = top;
	f [fontname = Arial, label = "flicker.py"];
	d [fontname = Arial, label = "data_services.py"];
	i [fontname = Arial, label = "io_services.py"];
	l [fontname = Arial, label = "log_services.py"];
	data [fontname = Arial, label = "The various data (.csv) files", shape = rectangle];
	
	f -> d;
	d -> f;
	f -> i;
	i -> f;
	f -> l;
	i -> data;
	data -> i;
}