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The Queen's necklace
on 23 Oct 2021
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col=20;
m=400;
cx=0;
cy=0;
l=5;
x=linspace(cx-l,cx+l,m);
y=linspace(cy-l,cy+l,m);
[X,Y]=meshgrid(x,y);
c=-0.01;
Z=X+i*Y+eps;
for k=1:col;
Z=Z.^Z+c;
W=exp(-abs(Z));
end
colormap prism(256)
pcolor(W');
shading flat;
axis('square','equal','off');