Negative numbers

[RUBiksCUbe]

I'm not using it for any math operations, just to control the start of a for loop.

for i = remaining toremaining + (rows - 1)
    if i < 0 then
        messageScroll[writePos] = $0
    endif
    if i >= 0 and i < messagelength then
        messageScroll[writePos] = message[i]
    endif
    if i >= messageLength then
        messageScroll[writepos] = $0
    endif
    writePos = writePos + 1
next i

for some reason when remaining is negative this part "crashes"