2d filter on hold, when let go it stops

(this is the 3rd time i’ve had to re-type this post so it’ll be quick, damn my internet!)
Basically what i want is, when i hold right mouse button, the rad blur 2d filter effect goes on, and when i let go, i need the rad blur to stop. (the object that causes the 2d filters is an empty named “FX” and it’s above the map) here is the .blend http://www.mediafire.com/download.php?arnmzmylmgy

EDIT: nvm i still need help…

Hope this helps


FX.blend (147 KB)

But how to use this with Motion Blur??

ah thanks excalaburr.