How to: script Artificial Intelligence

[YinYin]

Well just like normal mathematics you need to open and close your braces properly.
Your second if statement is missing the {do stuff}.
if (abs(self.x-target.x) > 0 && (self.state == 2 || self.state == 0)) { }
And I think you are missing/closing other {/} braces too.

First return 1;} closes the main ego() function (this should happen at the end).
Second if after long/mid again is missing braces. if (abs(self.x-target.x) > 0 && (self.state == 1 || self.state == 0)) { }

Maybe use Someoneelse's data changer and choose new AI file, it will make braces that belong together bold when your cursor is near them.