How to create random rectangles automatically?

I want to create many rectangles. This should be done automatically. How can I do this without typing thousands of values in my code? Is there an solution?

In my code I wrote every single coordinate point (4 points of each rectangle) manually in my vector "V".
Also how to connect them. "F"
And the value of each rectangle. "C"

clc
clear all
figure;
V = [0,0;1,0;1,1;0,1;5,5;10,5;10,10;5,10;2,2;4,2;4,4;2,4];
F = [1,2,3,4;5,6,7,8;9,10,11,12];%Dieser Vektor sagt mir in welcher Reihenfolge die Punkte
C = [50;24;99]; 
patch('Faces',F,'Vertices',V,'FaceVertexCData',C,'FaceColor','flat','EdgeColor','none') %Befehl fürs "zeichnen"
colormap(parula)
colorbar