Download the script
In the download, Dave provides a .zip file that contains the NullSwapper_v1_5.jsxbin file and the NullSwapper.aep project file he uses in the tutorial, so you can follow along if you like.
Right Click the link below and select “Save As”.
NullSwapper_v1_5.zip (CS5.5, CS6, AECC)
Check out the tutorial video, that we can unfortunately not embed here, at Provideocoalition.com
Want more about scripting?
Tutorials: After Effects ExtendScript Training by David Torno Ep. 1-19
Tutorial: Expression Shorts – Read External Text Document
Try free demos of Trapcode Particular and Plexus