I want to have a spot in my haunted house where the guests are walking down a hallway toward wall and as they turn the corner and most of the group is at the corner, a train comes barrelling at them.

I have a flood light that is on a wood cart that will roll on old garage door rails.

What I want to do is make it so that the cart is on the tracks about 10 feet back from the guests. When they set off the sensor the light comes on, a whistle blows, and the cart shoots toward them on the rails.

Then it recoils and is ready for the next group.

I would love to do this automatically without any need to reset it manually.

Any thoughts?????