Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. Create two variables that will keep track of the x-position and y-position of the ball, and assign the variables to their initial values.
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## 2. Create two variables that keeps track of the velocity (or the speed and direction) of the ball, and assign the variables to their initial values.
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## 3. Write the code that plots the initial position of the paddle and the ball.
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## 4. Write the code that moves the paddle up when Button A is pressed. (Don't worry about setting 'game running' to true.)
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## 5. Write the code that moves the paddle up when Button B is pressed. (Don't worry about setting 'game running' to true.)
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## 6. Write the code to update the y-velocity. (Hint: look at the function "update y velocity".)
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## 7. Write the code to move the ball. (Hint: look at the function "move ball".)
