# busybeaver4.yvtm 

tape:    "0"
blank:   "0"
start:   one
accept:  []
reject:  []

machine:

  - [  one,    0,       two,      1,      right ]
  - [  one,    1,       two,      1,      left  ]
  - [  one,    _,       two,      1,      right ]

  - [  two,    0,       one,      1,      left  ]
  - [  two,    1,       three,    0,      left  ]
  - [  two,    _,       one,      1,      left  ]

  - [  three,  0,       three,    1,      HALT  ]
  - [  three,  1,       four,     1,      left  ]
  - [  three,  _,       three,    1,      HALT  ]

  - [  four,   0,       four,     1,      right ]
  - [  four,   1,       one,      0,      right ]
  - [  four,   _,       four,     1,      right ]