Most probably start with a mockup in Photoshop/Gimp or Illustrator/Inkscape and then design the code to make a site look like their mockup. The first step is to

Most probably start with a mockup in Photoshop/Gimp or Illustrator/Inkscape and then design the code to make a site look like their mockup. The first step is to be an artist and have an idea of what you want to see.