To add more skills or change them you have to just copy and paste this following codes and just edit data-skill-value to adjust your skill ration

<div class="progress clear">
    <div class="skill-name">Photoshop</div>
    <div class="skill-bar">
        <div class="bar" style="width: 90%;"></div>
    </div>
    <div class="skill-lavel" data-skill-value="90%">90%</div>
</div>