Try changing the values of the sliders ([i][b]a[/b][/i] and [i][b]b[/b][/i]) and seeing what happens to the number of each color of squares, the total number of squares for each pattern, and the formula. [br][br]See if you can describe the relationships between the values of [i][b]a[/b][/i] and [b]b[/b], the formula, and the pattern.