pixelwidth = 100;
maxlines = 9;

rows = 3;
cols = 3;

sizes = [| [60,35,24],    [70,43,30,20], [30,20,15]
         | [70,43,30,20], [30,20,15],    [15]  
         | [60,35,24],    [70,43,30,20], [30,18,12] |];