Sea surface animation using random number and sine waveform in MATLAB

Code:

clc

clear all

close all

figure;

pause(5);

z=rand(1,100);

for i=1:100

    if(rem(i,2)==0)

        fill([-10 -10 10 10],[0 10  10 0],'k');

axis([-10 10 0 10]);

hold on;

t=-10:0.01:10;

x=5-z(i)*abs(sin(t));

area(t,x);

    else

        fill([-10 -10 10 10],[0 10  10 0],'k');

axis([-10 10 0 10]);

hold on;

t=-10:0.01:10;

x=5-z(i)*abs(sin(t+pi/2));

area(t,x);

    end

    pause(0.4);

    clf

end