Non deterministic algorithm

package se.clock;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;

public class clock {

    public static void main(String[] args) throws Exception {

        try (DataOutputStream dos = new DataOutputStream(
                new FileOutputStream(
                        new File("/tmp/nanoimage.data")))) {
            for (int i = 0; i < 250_000; i++) {
                dos.writeByte((byte) (System.nanoTime() & 0xff));
            }
        }
    }
}