I am managing to only come up with a product of the integer itself * 1, instead of a script that loops until the product is =>500. Help appreciated. See my attempt below;

x = [zeros(1, NumberOfAsterisksInEachDirection), linspace(0, width,
NumberOfAsterisksInEachDirection), linspace(0, width, 
NumberOfAsterisksInEachDirection),...

       ones(1, NumberOfAsterisksInEachDirection)*width];

[Kirby Fears]

It's not clear what you're trying to do or what loops have to do with it. Please try to elaborate.