ss="base03-sulphurpool-bg" />
  <rect x="600" y="0" width="150" height="150" class="base04-sulphurpool-bg" />
  <rect x="750" y="0" width="150" height="150" class="base05-sulphurpool-bg" />
  <rect x="900" y="0" width="150" height="150" class="base06-sulphurpool-bg" />
  <rect x="1050" y="0" width="150" height="150" class="base07-sulphurpool-bg" />
  <rect x="0" y="150" width="150" height="150" class="yellow-sulphurpool-bg" />
  <rect x="150" y="150" width="150" height="150" class="orange-sulphurpool-bg" />