Randomness debugging activity

This program should generate 10 random integers from 1 to 6. Fix it so that it works...

import java.util.random;

public class RandomGenerator{
    public static void main(String[] args)
    {
        output("Generate 10 random integers between 0 and 6");
        Random rnd;

        for (int i = 1; i <= 12; ++i)
        {
          int randomInt = 1 + rnd.nextInt(0 to 6);
          output("Generated number: " + randomInt);
        }

        output("Done.");
    }

  private static void output(String aMessage)
  {
    System.out.println(aMessage);
  }
}