Blueprint for Simple 1-2 Car Driveby?

So I followed this tutorial to set up a box mesh that could basically move back and forth between two points using a timeline.

However, I want to take this a step further somehow and make it so that it will spawn only on occasion just so it kinda looks like 1-2 cars are periodically driving past the player. Maybe even change the color of the car so it doesn’t always look the same. I don’t care how it’s done, just something simple.

How can I fix it to work like that? I am kinda stuck on this after several tries…