Robot following line

Hello guys! I need help with my project of university. I need make a Robot following line, my robot need have Arduino and need be fast. I don't know how begin my project someone can help me. What Arduino I need use for make this? my robot has that be quick and accurate (precise). Help me please

Use google, its pretty fast.

The first thing you need to do is a tutorial like this.

There are lots of threads on the forum where people pick up a bit of code here and a bit more there and try to tie them together and wonder why it doesn't work.

So learn the coding first. Then you can a) write some of your own code and b) at least understand the bits of existing code that you will collect as you look at the sites of the makers of various sensors and c) understand the coding help you will get here in the forum.