Smiling Face in MATLAB

Program :

t=0:0.001:2*pi;

x=2*cos(t);

y=1+2*sin(t);

fill(x,y,'g');

axis square

hold on

x2=-1+0.1*cos(t);

y2=2+0.1*sin(t);

fill(x2,y2,'k');

hold on;

x3=1+0.1*cos(t);

y3=2+0.1*sin(t);

fill(x3,y3,'k')

t=-0.4:0.1:0.4;

y=t.^2;

plot(t,y,'r','linewidth',5)