To Nest or Not to Nest Else

[OldMoses]

We don' need no stinking nests...  

Code: (Select All)

SCREEN _NEWIMAGE(500, 500, 32)
$COLOR:32
DO
    CLS
    LINE (200, 200)-(300, 300), Green, BF
    WHILE _MOUSEINPUT: WEND
    x = _MOUSEX: y = _MOUSEY
    IF x > 200 THEN IF x < 300 THEN IF y > 200 THEN IF y < 300 THEN _PRINTSTRING (240, 240), "OK!"
    _LIMIT 30
    _DISPLAY
LOOP UNTIL _MOUSEBUTTON(1) OR _KEYDOWN(27)

It seems like really, really bad form to me, but it compiles and runs...