Fibonacci Spiral - Click the Green Flag to draw it. Click stage to see an example of the Spiral in nature. Set "Show Squares?" to zero, to hide them and just draw the Spiral. Set "Show (Golden) Ratio Approx?" to 1 to see how the ratio of successive Fibonacci numbers approaches the Golden Ratio, and to draw a Golden Ratio Spiral over the top of the Fibonacci Spiral Set "Show List?" to 1 to see the List of Fibonacci Numbers (or the Ratios of them to the preceding term).
Created by @gregatku for use in Coding Classes for Kids Unlimited, for whom I work as a Coding teacher. Students will be asked to build this project from "scratch", including building the List of Fibonacci Numbers, drawing the Fibonacci Squares and the quarter circle arcs through them to form the Spiral. They will not be asked to add the Golden Ratio approximations, nor the other backdrop(s), these are just to show them at the end of the exercise, more interesting facts about Fibonacci Numbers.