Exercises

• Update Drawing so that it resets the turtle position when the user clears the screen with the Reset button.
• Our tests have a lot of duplication due to the repeated calls to triggerRequestAnimationFrame. Simplify how this is called by creating a wrapper function called triggerAnimationSequence that takes an array of frame times and calls triggerRequestAnimationFrame for each of those times.
• Loading an existing script (for example, on startup) will take a long time to animate all instructions, and so will pasting in code snippets. How would you modify the system to fast-forward animation in these circumstances?
• How does the undo and redo feature affect animation?