data heart;
do t = -3.14 to 3.14 by 0.01;
x = 16*sin(t)**3;
y = 13*cos(t) - 5*cos(2*t) - 2*cos(3*t) - cos(4*t);
output;
end;
run;
proc sgplot data=heart;
scatter x=x y=y / markerattrs=(symbol=CircleFilled color=red);
xaxis display=none;
yaxis display=none;
run;
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