move lessons out of web site

will move select lessons back to "educators" section

olddocs/lessons/strobe-light/activity.md

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+# strobe light activity
+
+Develop shapes with a for loop. 
+
+### ~avatar avatar
+
+
+
+Welcome! This guided tutorial will teach how to develop shapes with a for loop. Let's get started!
+
+### ~
+
+Create a `for loop` that will loop from 0 to 4 to indicate the x-coordinates of the micro:bit display.
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    
+}
+
+```
+
+Create another for loop that will loop from 0 to 4, indicating the y-coordinates of the micro:bit instead. This for loop will light each LED by column.
+
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+
+    }
+}
+```
+
+
+We will light up each LED by plotting them individually.
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+        basic.pause(200)
+    }
+}
+```
+
+
+The pause will add a delay between lighting each LED.
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+        basic.pause(200)
+    }
+}
+```
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/lessons/strobe-light/challenges)!
+
+### ~
+

olddocs/lessons/strobe-light/challenges.md

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+# strobe light challenges
+
+Coding challenges for strobe light.
+
+## Before we get started
+
+Complete the following [guided tutorial](/lessons/strobe-light/activity), your code should look like this:
+
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+        basic.pause(200)
+    }
+}
+```
+
+
+### Challenge 1
+
+
+
+Make the LEDs light up faster by changing the **pause** from 200 to 100 milliseconds:
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+        basic.pause(100)
+    }
+}
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 2
+
+
+
+Make the board light up by rows instead of by columns by swapping the `i` and `j` variables in `plot(i, j)`.
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(j, i)
+        basic.pause(100)
+    }
+}
+```
+
+* Run the code to see if it works as expected.
+
+### Challenge 3
+
+
+
+Now that all the LEDs are lit up, let's make them turn off by reversing the strobe light pattern! You can use `unplot` to turn off a single LED.
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(j, i)
+        basic.pause(100)
+    }
+}
+for (let k = 0; k < 5; k++) {
+    for (let l = 0; l < 5; l++) {
+        led.unplot(4 - l, 4 - k)
+        basic.pause(100)
+    }
+}
+```

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

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+# strobe light quiz answers
+
+Learn how to create a blinking images with a for loop.
+
+This is the answer key for the [strobe light quiz](/lessons/strobe-light/quiz).
+
+## 1. What is a for loop?
+
+Answers will vary. In general, for loop refers to the code that repeats for a fixed number of times. We specify the LED using x, y coordinates.
+
+## 2. Consider the following code
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+    }
+}
+```
+
+If the rectangle below represents a board that is 5 LEDs wide and 5 LEDs tall, place an X approximately where the LED is lighted. Explain why the LED is lighted there.
+
+![](/static/mb/lessons/cascade-0.png)
+
+This code turns on specific LED. Plot turns on the specified LED on the LED screen. We specify the LED using x, y coordinates. The code lights on the LEDs
+
+``x`` - the x coordinate or horizontal position (0,1,2,3,4)
+
+``y`` - the y coordinate or vertical position (0,1,2,3,4)
+
+## 3. Consider the following code
+
+```blocks
+for (let i1 = 0; i1 < 3; i1++) {
+    for (let j1 = 0; j1 < 3; j1++) {
+        led.plot(i1, j1)
+    }
+}
+```
+
+If the rectangle below represents a board that is 5 LEDs wide and 5 LEDs tall, place an X approximately where the LED is lighted. Explain why the LED is lighted there.
+
+![](/static/mb/lessons/cascade-1.png)
+
+This code turns on specific LED. Plot turns on the specified LED on the LED screen. We specify the LED using x, y coordinates.
+
+``x`` - the x coordinate or horizontal position (0,1,2)
+
+``y`` - the y coordinate or vertical position (0,1,2)
+
+## 4. Consider the following code
+
+```blocks
+for (let i2 = 0; i2 < 2; i2++) {
+    for (let j2 = 0; j2 < 2; j2++) {
+        led.plot(i2, j2)
+    }
+}
+```
+
+If the rectangle below represents a board that is 5 LEDs wide and 5 LEDs tall, place an X approximately where the LED is lighted. Explain why the LED is lighted there.
+
+![](/static/mb/lessons/cascade-2.png)
+
+This code turns on specific LED. Plot turns on the specified LED on the LED screen. We specify the LED using x, y coordinates.
+
+``x`` - the x coordinate or horizontal position (0,1)
+
+``y`` - the y coordinate or vertical position (0,1)
+

olddocs/lessons/strobe-light/quiz.md

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+# strobe light quiz
+
+Learn how to create a blinking LED script with a for loop.
+
+## Name
+
+## Directions
+
+Use this activity document to guide your work in the [strobe light tutorial](/lessons/strobe-light/activity)
+
+Answer the questions while completing the tutorial. Pay attention to the dialogues!
+
+## 1. What is a for loop?
+
+## 2. Draw which LEDs are ON after running this code
+
+```blocks
+for (let i = 0; i < 5; i++) {
+    for (let j = 0; j < 5; j++) {
+        led.plot(i, j)
+    }
+}
+```
+
+![](/static/mb/empty-microbit.png)
+
+## 3. Draw which LEDs are ON after running this code
+
+```blocks
+for (let i1 = 0; i1 < 3; i1++) {
+    for (let j1 = 0; j1 < 3; j1++) {
+        led.plot(i1, j1)
+    }
+}
+```
+
+![](/static/mb/empty-microbit.png)
+
+## 4. Draw which LEDs are ON after running this code
+
+```blocks
+for (let i2 = 0; i2 < 2; i2++) {
+    for (let j2 = 0; j2 < 2; j2++) {
+        led.plot(i2, j2)
+    }
+}
+```
+
+![](/static/mb/empty-microbit.png)
+