Brainfuck program to generate next binary number

binary.b

-       initial mark (FF)
        read input 49 = 1 and 48 = 0 (q0)
>>,[>,<-------- -------- -------- -------- -------- -------- >]
-       final mark (FF)
<[-<]   change ones for zeros until a zero is found (q1)
+       change zero for one (q1 to q2)
<       ignore all characters until FF is found (q2)
+       increase by one (ensures that the data pointer moves until FF is found)
[       if the byte at the data pointer is zero then FF was found
  -     it wasn't zero decrease it
  <     move left to check next bit
  +     increase by one as before
]       begin printing
>-[>-]+ ensure that no leading 0s are printed
+       increase by one to ensure that the byte at the data pointer is not FF
[
        add 47 (to print the character as either 0 or 1)
  ++++++++ ++++++++ ++++++++ ++++++++ ++++++++ +++++++ 
  .     print character
  >     go to next character
  +     add 1 as before
]