$icons: (
  area1-active,
  area1,
  area2-active,
  area2,
  area3-active,
  area3,
  battery_charge,
  battery,
  connect_off,
  connect_on,
  control,
  detail,
  dot,
  dropdown,
  edit,
  exit,
  pen,
  plus,
  redo,
  register,
  robot,
  save,
  search,
  trash_fill,
  trash,
  undo
);