You need two files from docsrc: * art/syntax/bubble-generator.tcl * art/syntax/bubble-generator-data.tcl The second file (the "-data.tcl" file) is the one you customize in order to generate your desired bubble diagrams. The first file is code that translates your "-data.tcl" file into art. You will need "wish" (the Tcl/Tk command-line shell) in order to run the bubble-generator.tcl tool. And you will need "convert" to translate the Postscript output from "wish" into GIF. And you will need "display" to display the generated GIF for verification. Summary of third-party tools needed: * wish * convert * display I don't recall any other requirements right this moment.