Pause panner cycle?

Hey there guys, how are you all doing? I have a question that I imagine must be quite simple but I’m not figuring it out. I have a bucket and an old water pump on top of it, and I want to create some water droplets inside the bucket. I managed to create the water ripples now I need the droplets which I’m trying to achieve by using a plane and an opacity map of a droplet that pans down the plane.

The panner node works like a charm for this, however, I don’t want the droplets to be constantly dropping. I want it to drop ,wait a second and drop another one… and keep going in that rhythm.

How can I achieve this?

Thank you very much in advance!