Render a graphical pattern where each pixel is colored by the value of 'x xor y' from an arbitrary color table.

w = 256
 
open window w, w
 
For x = 0 To w-1
    For y = 0 To w-1
        r =and(xor(x, y), 255)
        color r, and(r*2, 255), and(r*3, 255)
        dot x, y
    Next
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