You can animate your scale parameter to make your layer change in scale over time. Follow these steps to begin your animation journey.

1. Press the keyboard shortcut S for the scale parameter to come up.
2. Go in the timeline where you want the animation to begin.
3. Hit the stopwatch for scale.
4. Page Down to the right getting closer to the end of this animation.
5. Scrub the scale parameter. This will automatically create a blue diamond key frame.

 Let's preview that. If I want to give my layer a little bit of blur I'll hit the blur icon. Look in the time line:

This is an effect that has to be turned on in two places. It has to be turned on in the timeline in just above the timeline. If you hit the preview button you will see how it gives it a nice blur. That's how things to move in real life. There is always some kind of blur when things move fast.