Rainbow in MatLab

MATLAB program:

%Code:

figure;
pause(5);
t=0:0.001:pi;
x=8*cos(t);
y=8*sin(t);
fill(x,y,'r');
hold on;
x=7*cos(t);
y=7*sin(t);
patch(x,y,[1 0.5 0]);
hold on;
x=6*cos(t);
y=6*sin(t);
fill(x,y,'y');
hold on;
x=5*cos(t);
y=5*sin(t);
fill(x,y,'g');
hold on;
x=4*cos(t);
y=4*sin(t);
patch(x,y,[  0.5843    0.8157    0.9882]);
hold on;
x=3*cos(t);
y=3*sin(t);
fill(x,y,'b');
hold on;
x=2*cos(t);
y=2*sin(t);
patch(x,y,[0.4039    0.0078    0.3686]);
t=0:0.01:pi;
x=cos(t);
y=sin(t);
fill(x,y,'w');
plot([-1 1],[0 0],'w');
axis equal;


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