ference of the destination and source pixels.</p>

<p> 13 Exclusion: similar to Difference, but has lower contrast.
        </li>
    </ul>




    <h3>Usage:</h3>
    <ul>
        <li><pre class="example"><span class="comment">-- number vs. string input
</span>screen.<span class="function-name">blend_mode</span>(<span class="number">0</span>)
screen.<span class="function-name">blend_mode</span>(<span class="string">'over'</span>)</pre></li>
        <li><pre class="example"><span class="comment">-- case-ins