moving out outdated js docs

olddocs/js/lessons/pong/quiz-answers.md

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+# pong quiz answers
+
+create the game Pong.
+
+## Name
+
+## Directions
+
+Use this activity document to guide your work in the [pong tutorial](/lessons/pong/tutorial)
+
+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.
+
+<br/>
+
+```
+ballX = 2
+ballY = 1
+```
+
+## 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.
+
+<br/>
+
+```
+ballXVelocity = 1
+ballYVelocity = 1
+```
+
+## 3. Write the code that plots the initial position of the paddle and the ball.
+
+<br/>
+
+```
+led.plot(0, paddleY)
+led.plot(ballX, ballY)
+```
+
+## 4. Write the code that moves the paddle up when Button A is pressed. (Don't worry about setting 'game running' to true.)
+
+<br/>
+
+```
+input.onButtonPressed(Button.A, () => {
+    if (paddleNotUp()) {
+        led.unplot(0, paddleY)
+        paddleY = paddleY - 1
+        led.plot(0, paddleY)
+    }
+})
+```
+
+## 5. Write the code that moves the paddle up when Button B is pressed. (Don't worry about setting 'game running' to true.)
+
+<br/>
+
+```
+input.onButtonPressed(Button.A, () => {
+    if (paddleNotDown()) {
+        led.unplot(0, paddleY)
+        paddleY = paddleY + 1
+        led.plot(0, paddleY)
+    }
+})
+```
+
+## 6. Write the code to update the y-velocity. (Hint: look at the function "update y velocity".)
+
+<br/>
+
+```
+if (ballY == 4 || ballY == 0) {
+    ballYVelocity = (-1) * ballYVelocity
+}
+```
+
+## 7. Write the code to move the ball. (Hint: look at the function "move ball".)
+
+<br/>
+
+```
+led.unplot(ballX, ballY)
+ballX = ballX + ballXVelocity
+ballY = ballY + ballYVelocity
+```
+