<nav class="navbar sticky-top navbar-expand-lg">

    <a href="/" class="navbar-brand">
        <img src="../images/logo.png" alt="logo" width="130" height="90"></img>
    </a>

    <button class="navbar-toggler" data-toggle="collapse" data-target="#expand" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse justify-content-end" id="expand">
        <ul class="navbar-nav">
            <li class="nav-item" aria-current="true">
                <a href="/" class="nav-link mx-2">HOME</a>
            </li>
            <li class="nav-item">
                <a href="/about" class="nav-link mx-2">ABOUT US</a>
            </li>
            <li class="nav-item">
                <a href="/services" class="nav-link mx-2">SERVICES</a>
            </li>
            <li class="nav-item">
                <a href="/contact" class="nav-link mx-2">CONTACT US</a>
            </li>
        </ul>

    </div>

</nav>