HI i just bought the line following robot kit off of amazon and I made it and it always says "no such file or directory" I need to know how to fix this.
Please help
Start here
Read what AWOL linked.
Then post the full text of any and all error messages, inside code tags.
Whenever you ask any question about a situation in which an error message is shown (for arduino or anything else) you should always include the full text of any and all error messages. Error messages have meaning, and are usually critical for anyone to be able to help you.