Scratch

Hey everybody.
I'm working on a top-down scrolling racing game, but I am having trouble programming.
My road is drawn with the pen blocks and is not sprites, so at first I used predetermined points in my script to define how the road would look and it was fine.
Now I used objects in a list to define points and I didn't think it would ruin it, but whenever the car goes to the left side of the road it gets all glitchy and the road never seems to end unless I go to the sides (up or down).
Note: the game will mainly work with the experimental Flash viewer, and that was the only way I could test the game.
Project name:
http://scratch.mit.edu/projects/shwingie/1721299

Help would be appreciated in any way.