I was doing some work with Python turtle graphics for a project, and came up with this simple program that draws a square-ish spiral in multiple colors. It has a bit of a 3D effect. You can see it as a pyramid with you above, the levels ascending toward you, or you can see it (again from above) as a well with steps, going downward.
Here is the code and a screenshot of its output:
''' square_spiral.py A program that draws a "square spiral". Author: Vasudev Ram Copyright 2016 Vasudev Ram Web site: https://vasudevram.github.io Blog: http://jugad2.blogspot.com Product store: https://gumroad.com/vasudevram ''' import turtle t = turtle colors = ['blue', 'green', 'yellow', 'orange', 'red'] def pause(): _ = raw_input("Press Enter to exit:") def spiral(t, step, step_incr, angle): color_ind = 0 colors_len = len(colors) t.pencolor(colors[color_ind]) while True: t.forward(step) step = step + step_incr if step > 500: break t.right(angle) color_ind = (color_ind + 1) % colors_len t.pencolor(colors[color_ind]) t.hideturtle() pause() t.speed(0) spiral(t, 20, 5, 90.2)
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