The jython/ctc directory contains example and utility scripts for the JMRI USS CTC package of tools. See the documentation page.
The jython/ctc/TwoColumnMachine.py example script animates a sample two-column CTC machine. To use it, load the jython/ctc/TwoColumnMachine.xml panel file first, then run the sample script. See also the README.md file. It uses the naming conventions that are described on a documentation page, though of course you can use any names you'd like.