Space Road Block

Let the races begin! You are the owner/promoter of the biggest spaceship race taking place in the galaxy on Planet SHG but the drivers need your help. There is an annoying road block that needs to be moved every time the spaceships make a lap. It is up to you to move the road block just in time so the spaceships don't crash! If they crash, its game over. So you have to be quick with your fingers to move this road block so that the race continues, no one crashes, and you can rack up some points! The racers depend on you, the people of the entire galaxy are watching, do you have what it takes to have the longest race without any crashes?