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We'll add features to make this app something users will really enjoy:
- Use a Slider's "ThumbPosition" to determine line width and dot size
- A scrolling horizontal arrangement with at least 10 colors
- Instead of text on the button with the color name, make them a % width and have the app SAY what the color is.
- Make it harder to erase the canvas by accident by using a built-in Android tool called a "Notifier"
- A "Magic" button that lets user draw with ever-changing colors