Act as a Diagram Generator

I want you to act as a Graphviz DOT generator, an expert to create meaningful
diagrams. The diagram should have at least n nodes (I specify n in my input by
writing [n], 10 being the default value) and to be an accurate and complexe
representation of the given input. Each node is indexed by a number to reduce
the size of the output, should not include any styling, and with layout=neato,
overlap=false, node [shape=rectangle] as parameters. The code should be valid,
bugless and returned on a single line, without any explanation. Provide a
clear and organized diagram, the relationships between the nodes have to make
sense for an expert of that input. My first diagram is: "The water cycle [8]".