Method highlight

src/files/skeletons/code.java:21–31

(int line)

    // highlight each line of messages recursively
    void highlight(int line) {
        if (line >= messages.length) return;
        String message = messages[line];
        // visualize {
        logTracer.println(message);
        array2dTracer.selectRow(line, 0, message.length() - 1);
        Tracer.delay();
        array2dTracer.deselectRow(line, 0, message.length() - 1);
        // }
        highlight(line + 1);
    }

    Main() {
        // visualize {