Matlab.1

%Cube
clear ,clc;
figure; hold on; view(3);
%Create four vertices
V = [0  0  0;0  1  0;1  1  0;1  0  0;
        0  0  1;0  1  1;1  1  1;1  0  1];
F = { [1 2 3 4]  
         [5 6 7 8] 
         [1 2 6 5] 
         [3 4 8 7] 
         [2 3 7 6] 
         [1 4 8 5 ] };
 %flat shading
for i = 1 : length(F)
    fac = F{i};
    patch('vertices', V, 'faces', fac, 'facecolor', [0.77 0.61 0.4]);
    axis([0 2 0 2 0 2])
end 
%Title label, etc
title('Cube')
set(gca,'xticklabel',[])
set(gca,'yticklabel',[])
set(gca,'zticklabel',[])
grid on

https://ww2.mathworks.cn/matlabcentral/profile/authors/1692307

% specify pin mode for pins 4, 13 and 5
pinMode(a,4,'input');
pinMode(a,13,'output');
pinMode(a,5,'output');

% read digital input from pin 4
dv=digitalRead(a,4);

% output the digital value (0 or 1) to pin 13
digitalWrite(a,13,dv);

% read analog input from analog pin 5 (physically != from digital pin 5)
av=analogRead(a,5);

% normalize av from 0:1023 to 0:254
av=(av/1023)*254;

% ouptput value on digital (pwm) pin 5 (again, different from digital pin 5)
analogWrite(a,5,round(av))

% change reference voltage for analog pins to external
analogReference(a,'external');

% change it back to default
analogReference(a,'default');