This script lets you create a positive/negative Data Matrix[1] Bar Code suitable for feeding into your experimental dual extruders. Or if you just want a negative space object barcode to cut into another model.You can encode the whole thingiverse url in your barcode, but the result will be pretty big. Probably too large to stamp into another model. However, you can just encode the Thingiverse thing number to get a pretty small code!1: http://en.wikipedia.org/wiki/Data_MatrixInstall OpenSCAD, download my OpenSCAD bitmap library, and make sure you have Ruby on your system. Then run gem install semacode. Now you can edit the variables in datamatrix_dualstrusionator.scad and .rb and run the .rb script. It will shell out to OpenSCAD and generate an a.stl and a b.stl. You'll probably get the best results if you print it vertically. Note: the bigger the string, the painfully longer it takes. OpenSCAD is slow. :(