I'm trying to print out all the positive numbers of the Fibonacci sequence that are lower than four million.

```
public static void main(String[] args) {

    int n1 = 1;
    int n2 = 2;
    int n3 = 0;

    while (n3 <= 4000000) {
        n3 = n1 + n2;
        if (n3 % 2 == 0) {
            System.out.println(n3);
        }
        n1+=1;
        n2+=1;
    }
}

```