Speed car!

Hello!!! I just made speed car! It measures speed by the touch sensor. I used Sarial.p's gear ratio calculater to figure out the, well, gear ratio. Thanks Sarial! You can take a look at my calculations on my picture.
This is the underside.
This is the right side.
And this is the left side.
I currently do NOT have a program, but I'm working on it. This is mainly a building "trick". Meaning, I can maybe use a simalar idea in a future creation. Wacth the movie too!