They melt as they course through what one might call a ‘pin ball machine’ system of a typical robot. In programming, these marbles will represent data and when product after product or data after data are flowing through, in one direction, in order to change directions, you might use a pointer.
It’s easy enough to increment or decrement and go from one data product to another, but when you have to change directions amidst the hard drive mapping, you might use a pointer to point to a different address Object-Oriented Graphics I once had a wise computer programming college.