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diff --git a/info/drawing-with-metapost/src/color-blend-toy.mp b/info/drawing-with-metapost/src/color-blend-toy.mp
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+++ b/info/drawing-with-metapost/src/color-blend-toy.mp
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+\documentclass{standalone}
+\usepackage{luamplib}
+\begin{document}
+\begin{mplibcode}
+beginfig(1);
+ color brg, pbr;
+ brg = 1/256 (1, 66, 37);
+ pbr = 1/256 (223, 52, 57);
+ N = 5; n = 0;
+ for y=1 upto N:
+ for x=1 upto N:
+ fill fullcircle scaled 16 shifted 20(x,y)
+ withpen pencircle scaled 2
+ withcolor (n/N/N)[pbr, brg];
+ label(decimal incr n infont "phvr8r", 20(x,y))
+ withcolor white;
+ endfor
+ endfor
+endfig;
+\end{mplibcode}
+\end{document}