MATLAB: How to plot different quadrilateral with different range of coordinates per node

coordinatesquadrilateralsubplot

I have a square with dimension of 50×50 with four nodes, each node will vary in range of (-10,10) which means each corner of the square has 3 nodes along x axis (Fig below)
I want to connect each node per corner to nodes in other corners in order to make different quadrilateral with different shape. For this special case It would be 3^4=81 different shapes and I need to plot them as subplot (8,8,n), I have written intial part of the code but I dont know how to connect all coressponding nodes to each other to make 64 different quadrilateral. Could you please tell me how to do this? Thanks
clc;
clear;
close all;
x = [-25; 25; 25; -25];
y = [-25; -25; 25; 25];
for i=1:4
    
        for j=-10:10:10
                  
           x(i,:)=x(i,:)+j;
           Y(:,:)=y;
           subplot(2,2,i);
           
       
      plot(x,y,'.');
xlim([-50 50])
ylim([-50 50])
k = boundary(x,y);
hold on;
plot(x(k),y(k));
        end 
end

Best Answer

Look at my soultion
clc,clear
x = [-1 1 1 -1]*25;
y = [-1 -1 1 1]*25;
plot(x,y,'or');                 % plot original nodes
axis([-1 1 -1 1]*40)            % axes boundaries
hold on
k = 0;
for i = 1:4
    for j = -10:10:10
        x1 = x;                 % create a copy of "x"
        x1(i) = x1(i) + j;      % modify current node
%         k = k + 1;
%         subplot(4,3,k)
        h = plot([x1 x1(1)],[y y(1)],'.-b');
        pause(1)
        delete(h);
    end
end
hold off
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