Let Us Line Up

Remember the 'Scalping Lines' game ? Well it's kind of the same thing here, but the crates do it instead and the movement isn't reversed. Think of it as moving one large line of crates. Oh and the movement is procedural too, which means that a crate must be able to move forward if they want to convey the movement to the other ones. Man, info dumping is a lot harder than it seems.