% triangle composition - using recursion.
%
   h=figure;
   set(gcf,'DefaultTextColor','red');
   v=get(h);
   c=[0 100 100 0 0];
   d=[0 0 100 100 0];
   plot(c,d, 'g-');
   title('Recursion');
   
   a=10;
   b=10;
   len=80;
   level=3;
   factor=3;
   square_recursive(level,a,b,len,factor);