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Solar Eclipse
on 19 Oct 2022
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n=660
m=n/3+1 %good 300/73
axis([-1 1 -1 1])
axis square
axis off
z = exp(2i*pi*(0:n)/n);
zj=[z;z(mod((0:n)*m,n)+1)];
line(real(zj),imag(zj),'color','r')
set(gcf,'Color','k')