Migrate docs from the other repo

docs/lessons/strobe-light/activity.md

@@ -0,0 +1,55 @@
+# strobe light activity
+
+Develop shapes with a for loop. 
+
+### ~avatar avatar
+
+### @video td/videos/strobe-light-0
+
+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.
+
+![](/static/mb/blocks/lessons/strobe-light-3.jpg)
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/microbit/lessons/strobe-light/challenges)!
+
+### ~
+

docs/lessons/strobe-light/challenges.md

@@ -0,0 +1,73 @@
+# strobe light challenges
+
+Coding challenges for strobe light.
+
+## Before we get started
+
+Complete the following [guided tutorial](/microbit/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
+
+### @video td/videos/strobe-light-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
+
+### @video td/videos/strobe-light-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
+
+### @video td/videos/strobe-light-ultimate
+
+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)
+    }
+}
+```