need help finding a third option

<?php if ( $field_music[0]['value'] == "Yes" ):?>      <a class="listing" href="#"><img src='/images/music.png' alt='his site plays music.' name='music' width='30' height='30' id="music" /><span>This site plays music.</span></a>      <?php endif; ?>      <?php if ( $field_music[0]['value'] == "No" ):?>      <img src="/images/musicgray.png" alt="This site does not play music." name="musicgray" width="30" height="30" border="0" id="musicgray" />      <?php endif; ?>