How to use expressions in action to make a cool counter contraption. Shows how one prototype expression can be added to multiple channels using the SelectionOrder keyword, how to isolate columns of numbers, and otherwise fill your head with expression ideas.
Prototype Expression: if(((trunc((control.position.x/1))%10)==1),0,100)
It may be easier to paste that rather than type, but it should be clear what to do in the demo.