<--
---   Diagonal to right move
-->
= e
(
  u f r f l d
)
<--
---   Block
-->
= c
(
  [
    [**],
    [**]
  ]
)
<--
---   Glider gun
-->
= a
(
  [
    c
    11 f
    [
      d r f b f f
      e e r e e
      d [ f r f f ]
      r f f e e r e
    ]    
    10 f
    [
      [ f d 3 f r f ]
      l f r
      [ d 3 f ]
      l f r
      [ d u 3 f d ]
      l f r
      [ d 3 f ]
      l f r f
      [ d 3 f l f ]
    ]
    13 f l 2 f r c
  ]
)

50 x 20 y
r a b f f f - a
