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#Matlab, 141

I just submit this for you, Lembik, to have a complete list.

v=-100:100; [x,y,m]=ndgrid(v,v,0); while 1; c=m; c(x+i*y==round(75*(-1)^(s/30)))=1; imshow(c); colormap([1,1,1;.5,0,.5]); s=mod(s-1,60); pause(1); end