Thue-Morse sequence

import java.util.*;

public class ThueMorse {
    public static void main(String[] args) {
        ArrayList<Integer> sequence = new ArrayList<Integer>();
        sequence.add(0);
        int i = 0;
        while (i < 10){
            sequence.addAll(oppositeNum(sequence));
            System.out.println((sequence));
        i++;
        }

    }

    public static ArrayList<Integer> oppositeNum(ArrayList<Integer> current){
        ArrayList<Integer> updated = new ArrayList<Integer>();
        for (int i = 0; i < current.size(); i++){
            if (current.get(i) == 0){
                updated.add(1);
            }
            else{
                updated.add(0);
            }

        }
        return updated;

    }

}