import java.util.Random;

/** Program to test reaction time.
 */
class Reaction {
    // We have to declare that main can throw an exception, because
    // the sleep call can throw an InterruptedException.
    public static void main(String[] args) throws InterruptedException {
        Random rand = new Random();
        // This sleeps for 1000 ms (1 second), but you should instead
        // use the rand object to pick a random number of ms to sleep.
        Thread.sleep(1000);
        System.out.println("Hit Enter!");
        // Insert timing code, check for when Enter is hit 
        // (using System.in.read()), and print results.
    }
}