Snowman in a snow

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Jan Studnicka
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Snowman in a snow

on 29 Nov 2023

drawframe(1);

Write your drawframe function below

function drawframe(f)
persistent h i n A I mapsize
if f == 1
    n = 48;
    C = rand(n);
    h = imshow(C);
    map = [0.95 0.95 0.95; repmat([0 0 0.75; 0 0 0.8],10,1)];
    mapsize = size(map);
    colormap(map)
    i = 1:n^2;
    A = h.CData;
    I = A(end,:) > 1/mapsize(1);
    hold on
    snowman = plot(24, 38, 'o', ...
        24, 42, 'o', ...
        24, 47, 'o', ...
        MarkerFaceColor = 'white', ...
        MarkerEdgeColor = 'none');
    snowman(1).MarkerSize = 15;
    snowman(2).MarkerSize = 20;
    snowman(3).MarkerSize = 25;
end
A(mod(i+1,n^2)+1) = A(mod(i,n^2)+1);
I = I.*A(end,:) > 1/mapsize(1);
h.CData = A.*[ones(n-1,n);I];
i = i+1;
end