13.1.1 half pyramid write a program that fills half the canvas with circles in a diagonal formation. have tracy draw circles along the width of the canvas on the bottom row. have the number of circles decrease by 1 on each iteration until there is only 1 circle on the top row. follow these guidelines: - use a radius value of 25 pixels for all circles - create a variable called circle_amount that keeps track of how many circles should be in each row. hint: the bottom row should start with 8 circles!