ALl right, source code:
ALLOWESCAPE TRUE
CREATESCREEN 1, 1, 480, 480
USESCREEN 1
DRAWRECT 0, 0, 480, 480, RGB (255, 0, 0)
USESCREEN -1
DRAWSPRITE 1, -120, -120
SHOWSCREEN
WHILE TRUE
MOUSEWAIT
WEND
END
On a 240x240 PDA, the above code should make the entire screen red. It actually only draws a 120x120 red square in the top left corner of the screen.