; transforms
(clear)
(transform:move 150 150)
(fill 
  (circle 0 0 150) theme:b_inv)
(transform:move 300 0)
(transform:rotate 
  (rad 90))
(fill 
  (circle 0 0 150) theme:b_high)
(transform:move 300 0)
(transform:rotate 
  (rad 90))
(fill 
  (circle 0 0 150) theme:b_med)
(transform:move 300 0)
(fill 
  (circle 0 0 150) theme:b_low)
(transform:reset)