StatementsDemo.java

import java.util.List;
import java.util.LinkedList;

public class StatementsDemo
{
    public static void main(String args[])
    {
        Node firstMsg = new PrintNode(new NumberNode(1), "newline");
        Node secondMsg = new PrintNode(new NumberNode(2), "newline");
        
        Node wait = new WaitNode(new NumberNode(new Integer(2000)));

        List<Node> script = new LinkedList<Node>();
        script.add(firstMsg);
        script.add(wait);
        script.add(secondMsg);
        
        for (Node statement:script)
            statement.eval();
    }
}