ss="nav-unit-title"> Set Theory </span>
            </div>
            <div class="nav-unit-wrapper" id='two'>
                <img src="../img/tiles/2-2.png">
                <span class="nav-unit-title"> Counting </span>
            </div>
            <div class="nav-unit-wrapper" id='three'>
                <img src="../img/tiles/2-3.png">
                <span class="nav-unit-title"> Conditional Probability </span>
            </div>
        </div>
        <div class="visualization-section" id="section-