We Need a "Map of Qubes"

Anyone know if there are any good guides on text based diagramming and wireframing? I saw this cool diagram that Sven made, I never thought to be able to do anything like that. If I could find some sources for inspiration this would definitely help with outlining this map.

Check it out so cool:

(clockvm)-------------------------------------------------------+
                                                                |
(updates)-----------+                                           |
                    |                                           |
{private-*}--[sys-firewall-anon]--[sys-tor]--[sys-firewall]--[sys-net]
                                      |             |
(dvm-anon)----------------------------+             |
                                                    |
(dvm-cleanet)---------------------------------------+
                                                    |
{work-*}--------------------------------------------+

Source:
https://forum.qubes-os.org/t/which-vpn-do-you-use/3406/3?u=gateofranre