Example of a complex loop structure:
101 begin (BEGIN the outer loop)
dup while 1 - (This WHILE, ...)
dup not if break then (this BREAK, and..)
dup 2 % not if continue then (this CONTINUE refers to the outer loop)
dup 10 % not if
15 begin (BEGIN inner loop)
dup while 1 - (This WHILE, and.. )
dup 5 % not if break then (... this BREAK, refers to inner loop)
repeat (This REPEAT statement ends inner loop.)
then
dup 7 % not if continue then (This CONTINUE, and...)
dup 3 % not if dup 9 % while then (this WHILE refers to the outer loop)
dup intostr me @ swap notify
dup 1 = until pop (This UNTIL ends the outer loop)
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