A noob needs his code checked

Hey I'm and electrical engineering student so programming is not my forté. I was wondering if someone could check over my code, the purpose is to turn on a red led if a car goes faster than 120 km/h by using two sensors 30m apart.

Here is the link to my code  http://pastebin.com/7dJeKLqh

Thanks for the help!

>>10
`>Please greentext when you imply!