I have to make a 1v1 robot

Hello everyone,

I have to make a good 1v1 robot with robotclass .robot

The problem is: I can't even get better then the sample robot 'Walls'. Is there anyone who can help me to build a better, but not to difficult 1v1 robot?

I'd like to make a robot just like walls, but with a better radar. Which radar should I use? Also, almost every single shot i fire misses the opponent... How am I able to improbe that?

Gertjan