move lessons out of web site

will move select lessons back to "educators" section

olddocs/lessons/night-light/activity.md

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+# night light activity
+
+Change the brightness of the micro:bit.
+
+### ~avatar avatar
+
+Welcome! This tutorial will teach you how to change the brightness of the micro:bit. Let's get started!
+
+### ~
+
+The brightness of the LED screen can be changed by using the `set brightness` function. This function takes a number between ``0`` (off) and ``255`` (full brightness).
+
+Let's build a little app that dims the screen when pressing button ``A``.
+
+Add the code `show LEDs` and select all LEDs to turn on all the LEDs. Don't hesitate to run your code to see what happens.
+
+```blocks
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+```
+
+The screen starts with a 50% brightness value by default (128). Add a new line of code to set the full brightness (255) using `set brightness`.
+
+```blocks
+led.setBrightness(255)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+```
+
+Add a new event handler for `on button pressed(A)` and add the code to set the brightness to `64`.
+
+
+```blocks
+led.setBrightness(255)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+input.onButtonPressed(Button.A, () => {
+    led.setBrightness(64)
+})
+
+```
+
+
+
+### ~avatar boothing
+
+Excellent, you're ready to continue with the [challenges](/lessons/night-light/challenges)!
+
+### ~
+

olddocs/lessons/night-light/challenges.md

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+# night light challenges
+
+Coding challenges for night light.
+
+## Before we get started
+
+Complete the following [guided tutorial](/lessons/night-light/activity), your code should look like this:
+
+
+```blocks
+led.setBrightness(255)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+input.onButtonPressed(Button.A, () => {
+    led.setBrightness(64)
+})
+
+```
+### Challenge 1
+
+
+
+What if we want to turn off all the LEDs? Let's do this by setting the brightness to `0` when button `B` is pressed. Add an event handler with `on button pressed(B)` add `set brightness(0)` to turn off the LEDs.
+
+
+```blocks
+led.setBrightness(255)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+input.onButtonPressed(Button.A, () => {
+    led.setBrightness(64)
+})
+input.onButtonPressed(Button.B, () => {
+    led.setBrightness(0)
+})
+```
+
+
+### Challenge 3
+
+Add an event handler with `on shake` to change the LED brightness back to a `255`.
+
+* `Run main` your script to see the LEDs change brightness.

olddocs/lessons/night-light/offset-image/activity.md

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+# offset image challenges
+
+Coding challenges for the offset image tutorial.
+
+## Before we get started
+
+Complete the following exercise. Your code should look like this:
+
+```blocks
+offset = 0
+basic.forever(() => {
+    if (offset == -4) {
+        basic.showString("Push button A", 150)
+    }
+    images.createImage(`
+. . # . .
+. . # . .
+. . # . .
+. # # # .
+. . # . .
+`).showImage(offset)
+})
+input.onButtonPressed(Button.A, () => {
+    offset = offset + 1
+})
+```
+
+### Challenge 1
+
+Create a condition for if button `B` is pressed. We want the image to move to the left when button `B` is pressed.
+
+```
+offset = 0
+basic.forever(() => {
+    if (offset == -4) {
+        basic.showString("Push button A", 150)
+    }
+    images.createImage(`
+. . # . .
+. . # . .
+. . # . .
+. # # # .
+. . # . .
+`).showImage(offset)
+})
+input.onButtonPressed(Button.A, () => {
+    offset = offset + 1
+})
+input.onButtonPressed(Button.B, () => {
+    offset = offset - 1 // ***
+}) // ***
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 2
+
+
+
+Now we want to make sure that the button does not go off the screen to the right. Add a new line that checks to see if offset = 5 after button `A` is pressed.
+
+If `offset = 5` then prompt the user to move the image to the left by displaying the text: "Push button B".
+
+```
+offset = 0
+basic.forever(() => {
+    if (offset == -4) {
+        basic.showString("Push button A", 150)
+    }
+    if (offset == 5) {
+        basic.showString("Press Button B", 150) // ***
+    }
+    images.createImage(`
+. . # . .
+. . # . .
+. . # . .
+. # # # .
+. . # . .
+`).showImage(offset)
+})
+input.onButtonPressed(Button.A, () => {
+    offset = offset + 1
+})
+input.onButtonPressed(Button.B, () => {
+    offset = offset - 1
+})
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 3
+
+Now make sure the image does not go off the left side and if it does, prompt the user to push button `A`.
+

olddocs/lessons/night-light/offset-image/quiz-answers.md

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+# offset image quiz answers
+
+shift an image horizontally across the display with offset.
+
+This is the answer key for the [offset image quiz](/lessons/offset-image/quiz).
+
+## 1. What is a 'if, then, else statement' ? 
+
+<br/>
+
+An if-then statement will run a block of code if the condition specified is true. The statement will run the "else" block of code if that condition is false.
+
+## 2. Consider the message
+
+Write the line of code that that will create the message "Push button A" (Hint: This message appears `if` the offset is equal -4 then the BBC micro:bit will state "Push Button A").
+
+<br/>
+
+```
+if (offset == -4) {
+    basic.showString("Push Button A", 150)
+}
+```
+
+## 3. Consider the following image
+
+![](/static/mb/lessons/offset-image-0.png)
+
+When with this image be displayed?
+
+<br/>
+
+When the offset is NOT equal to -4 then the BBC micro:bit will show the image above.
+
+## 4. Consider the following image
+
+![](/static/mb/lessons/offset-image-1.png)
+
+Write the two lines of code that cause the `variable` offset to increase by one when button `A` is pressed.
+
+<br/>
+
+```
+input.onButtonPressed(Button.A, () => {
+    offset = offset + 1
+})
+```
+

olddocs/lessons/night-light/offset-image/quiz.md

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+# offset image quiz
+
+shift an image horizontally across the display with offset.
+
+## Name
+
+## Directions
+
+Use this activity document to guide your work in the [offset image activity](/lessons/offset-image/activity).
+
+Answer the questions while completing the tutorial. Pay attention to the dialogues!
+
+## 1. What is an 'if, then, else statement' ? 
+
+<br/>
+
+## 2. Write the line condition that if true, will display the message "Push button A". This message appears if the offset is equal -4 then the BBC micro:bit will state "Push Button A".
+
+<br/>
+
+<br/>
+
+## 3. Write the one line of code to show this image
+
+![](/static/mb/lessons/offset-image-0.png)
+
+<br/>
+
+<br/>
+
+## 4. Write the two lines of code that trigger the variable offset to increase by one.
+
+![](/static/mb/lessons/offset-image-1.png)
+
+<br/>
+

olddocs/lessons/night-light/quiz-answers.md

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+# night light quiz answers
+
+Answers to the night light quiz.
+
+This is the answer key for the [night light quiz](/lessons/night-light/quiz).
+
+## 1. Define the function "set brightness" 
+
+This function sets the brightness of the LED screen.
+
+## 2. Consider the following image
+
+![](/static/mb/lessons/night-light-0.png)
+
+If the rectangle above represents the BBC micro:bit, write the code to set all the LEDs to full brightness and to turn on all the LEDs.
+
+<br />
+
+```blocks
+led.setBrightness(255)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+```
+
+## 3. Consider the following image
+
+![](/static/mb/lessons/night-light-1.png)
+
+If the rectangle above represents the BBC micro:bit, write the code to set the screen brightness to 50% (128) and turns on all the LEDs.
+
+<br/>
+
+```blocks
+led.setBrightness(128)
+basic.showLeds(`
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    # # # # #
+    `)
+```
+
+## 4. Consider the following image
+
+![](/static/mb/lessons/night-light-2.png)
+
+If the rectangle above represents the BBC micro:bit, write the code to turn off all the LEDs.
+
+```blocks
+led.setBrightness(0)
+```
+

olddocs/lessons/night-light/quiz.md

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+# night light quiz
+
+change the brightness of the BBC micro:bit.
+
+## Name
+
+## Directions
+
+Use this activity document to guide your work in the [night light tutorial](/lessons/night-light/activity)
+
+Answer the questions while completing the tutorial. Pay attention to the dialogues!
+
+## 1. Describe what "led->set brightness" does ? 
+
+## 2. If the picture below is the BBC micro:bit, write the code that sets all the LEDs to full brightness and turns on all the LEDs
+
+![](/static/mb/lessons/night-light-0.png)
+
+<br />
+
+## 3. If the picture below is the BBC micro:bit, write the code that sets the screen brightness to 50% (128) and turns on all the LEDs.
+
+![](/static/mb/lessons/night-light-1.png)
+
+<br/>
+
+## 4. If the picture below is the BBC micro:bit, write the code turns off all the LEDs.
+
+![](/static/mb/lessons/night-light-2.png)
+