Brainfuck test program written by Robert de Bath
Length is 140 instructions
It needs 7 cells
It checks for a number of mistakes commonly made in simple interpreters

>++++++++[-<+++++++++>]<.>>+>-[+]++
>++>+++[>[->+++<<+++>]<<]>-----.>->
+++..+++.>-.<<+[>[+>+]>>]<---------
-----.>>.+++.------.--------.>+.>+.
