copying from two container fields to make a blinking container field.

I am using a script with repeating container fields. I would like to create a blinking effect in a container field. is it somehow possible to copy from 2 container fields in succession and have it loop. one containing a red image and one containing a blue image?The script below copies a red image into a container field and when the user clicks again it becomes empty. But i would like the user to click on the field and have filemaker copy the red to the new container field and then copy from another field containing a blue image and loop that process. Is this possible.

Case (

IsEmpty ( blank::button 1 [ Get ( ScriptParameter ) ] ) ;

blank::red ;

""

)

The 2 fields I would user are

blank::red

blank::blue