Skill - mod_custom

Hi, thanke you in advance. I would like to change somethink in "skill". Could you explain me
<div class="skill"><span class="bar w50 color3">50</span>Bologna</div>
I have to create a ranking about percentage of home automation in the italian cities.
For example
Bologna 50%
Roma 37%
Cagliari 13%
www.domuspostera.it

thanke you, by