Number Models 2

1. Make a progress bar that shrinks in half every time a key is hit.

   

<figure>
<img src="2017-10-27-bar-2.png"/> 

<figure>
<img src="2017-10-27-bar-3.png"/> 

2. Make a dot that moves along a line from (50,0) to (250,300).

3. Exercise 8.4.4 from the text. Be sure to follow the design process!