Brainfuck на AppleScript

#!/usr/bin/osascript
-- AppleScript Brainfuck interpreter
-- Evgeny Stepanischev 1 Jul 2011 //bolknote.ru

set Cells to {}
repeat 30000 times
    set end of Cells to 0
end repeat

display dialog "Enter your BF program" default answer ""
set Bf to text items of text returned of result

set Pointer to 1
set CmdPointer to 1
set Output to ""
set Input to {}
set Stack to {}

repeat while CmdPointer ≤ (count of Bf)
    set Cmd to item (CmdPointer) of Bf
    
    if Cmd is equal to ">" then
        set Pointer to Pointer + 1
        if Pointer > 30000 then set Pointer to 1
        
    else if Cmd is equal to "<" then
        set Pointer to Pointer - 1
        if Pointer < 1 then set Pointer to 30000
        
    else if Cmd is equal to "+" then
        set Val to (item (Pointer) of Cells) + 1
        if Val is greater than 255 then set Val to 0
        copy Val to item (Pointer) of Cells
        
    else if Cmd is equal to "-" then
        set Val to (item (Pointer) of Cells) - 1
        if Val is less than 0 then set Val to 255
        copy Val to item (Pointer) of Cells
        
    else if Cmd is equal to "." then
        set Output to Output & (ASCII character item (Pointer) of Cells)
        
    else if Cmd is equal to "," then
        if Output ≠ "" then
            display alert Output
            set Output to ""
        end if
        
        if Input is {} then
            display dialog "Enter one or more characters" default answer ""
            set Res to text returned of result
            
            set item (Pointer) of Cells to ASCII number of character 1 of Res
            
            try
                set Input to rest of text items of Res
            end try
            
        else
            set item (Pointer) of Cells to ASCII number of item 1 of Input
            set Input to rest of Input
        end if
        
    else if Cmd is equal to "[" then
        if item (Pointer) of Cells = 0 then
            set CmdPointer to CmdPointer + 1
            set Deep to 1
            
            repeat while CmdPointer ≤ (count of Bf)
                set Cmd to item (CmdPointer) of Bf
                
                if Cmd is equal to "[" then
                    set Deep to Deep + 1
                else if Cmd is equal to "]" then
                    set Deep to Deep - 1
                    
                    if Deep is 0 then exit repeat
                end if
                
                set CmdPointer to CmdPointer + 1
                
            end repeat
        else
            set Stack to (CmdPointer - 1) & Stack
        end if
    else if Cmd is equal to "]" then
        if item (Pointer) of Cells ≠ 0 then
            copy item (1) of Stack to CmdPointer
        end if
        set Stack to rest of Stack
    end if
    
    set CmdPointer to CmdPointer + 1
end repeat

if Output ≠ "" then
    display alert Output
end if