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@ -1,94 +0,0 @@
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(
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(globals . (
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(hline1 . (fn () (screen y lo hi color)
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(if (>= lo hi)
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()
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((fn ()
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(pixel screen lo y color)
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(hline1 screen y (+ lo 1) hi color))))))
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(vline1 . (fn () (screen x lo hi color)
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(if (>= lo hi)
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()
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((fn ()
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(pixel screen x lo color)
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(vline1 screen x (+ lo 1) hi color))))))
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(hline . (fn () (screen y color)
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(hline1 screen y 0 (width screen) color)))
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(vline . (fn () (screen y color)
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(vline1 screen y 0 (height screen) color)))
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(andf . (fn () (a b)
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(if a
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(if b
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1
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())
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())))
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(brline . (fn () (screen x0 y0 x1 y1 color)
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((fn (dx dy sx sy)
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((fn (err)
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(brline1 screen x0 y0 x1 y1 dx dy sx sy err color))
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(+ dx dy)))
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(abs (- x1 x0))
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(- 0 (abs (- y1 y0)))
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(sgn (- x1 x0))
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(sgn (- y1 y0)))))
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(brline1 . (fn () (screen x y xmax ymax dx dy sx sy err color)
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(pixel screen x y color)
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(if (andf (= x xmax) (= y ymax))
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()
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((fn (e2)
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(brline1 screen
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(if (>= e2 dy)
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(+ x sx)
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x)
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(if (<= e2 dx)
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(+ y sy)
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y)
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xmax
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ymax
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dx
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dy
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sx
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sy
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(+ err
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(+
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(if (>= e2 dy)
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dy
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0)
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(if (<= e2 dx)
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dx
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0)))
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color))
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(* err 2)))))
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(read_line_2 . (fn () (keyboard stream)
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((fn (c)
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(if (= c 10)
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stream
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(if (= c 0)
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stream
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(read_line_2 keyboard (write stream c)))))
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(key keyboard))))
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(read_line . (fn () (keyboard)
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(read_line_2 keyboard (stream))))
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(fill_rect . (fn () (screen x1 y1 x2 y2 fill_color)
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(if (>= y1 y2)
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()
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((fn ()
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(hline1 screen y1 x1 x2 fill_color)
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(fill_rect screen x1 (+ y1 1) x2 y2 fill_color))))))
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(chessboard . (fn () (screen px)
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(chessboard1 screen px 0 15)))
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(chessboard1 . (fn () (screen px y color)
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(if (>= y (height screen))
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()
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((fn ()
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(chessboard2 screen px y 0 color)
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(chessboard1 screen px (+ y px) (- 15 color)))))))
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(chessboard2 . (fn () (screen px y x color)
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(if (>= x (width screen))
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()
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((fn ()
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(fill_rect screen x y (+ x px) (+ y px) color)
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(chessboard2 screen px y (+ x px) (- 15 color)))))))
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))
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(sandbox . (+ 1 2))
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)
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