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  • Mixing colorful dots

on 28 Nov 2023
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drawframe(3);
Write your drawframe function below
function drawframe(f)
% Credit
% https://twitter.com/Pixelated_Donut/status/1726602167019241671
% https://twitter.com/Yugemaku/status/1726559476172616047
persistent c s
if isempty(c)
c = colororder;
idx = randi(6,200,1);
c = c(idx,:);
s = ones(200,1)*25;
N = 60;
s(N) = 100;
c(N,:) = [1,1,1];
end
phi = (1+sqrt(5))/2;
factor = 3.0/2;
%% T = 0~0.5
T = 1/48*f;
i = 1:200;
a2 = mod(phi*i-T,1);
a2 = a2 - 0.2;
a2(a2<0) = 0;
a2 = a2/0.8;
alpha = 2*pi*(2*phi*i - a2.^factor);
x = sin(alpha).*sqrt(i);
y = cos(alpha).*sqrt(i);
scatter(x,y,s,c,'filled');
axis off equal
set(gcf,'Color','black')
xlim([-15,15]);
ylim([-15,15]);
end
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