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docs/reference/js/lessons/blink/challenges.md

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+# blink challenges
+
+Coding challenges for the blink tutorial #docs #challenges
+
+## Before we get started
+
+Complete the [blink](/microbit/lessons/blink/activity) activity and your code will look like this:
+
+```
+basic.forever(() => {
+    led.plot(2, 2)
+    basic.pause(200)
+    led.unplot(2, 2)
+    basic.pause(200)
+})
+```
+
+### Challenge 1
+
+### @video td/videos/blink-1
+
+Let's display a "smiley face" on the screen! We'll start by plotting the eyes.
+
+Add `led->plot (1,1)` and `led->plot(3,1)` under `led->plot(2,2)` ; then add `led->unplot(1,1)` and `led->unplot(3,1)` after pause. When you're ready, don't forget to run your code to try it out!
+
+```
+basic.forever(() => {
+    led.plot(2, 2)
+    led.plot(1, 1) 
+    led.plot(3, 1) 
+    basic.pause(200)
+    led.unplot(2, 2)
+    led.unplot(1, 1) 
+    led.unplot(3, 1) 
+    basic.pause(200)
+})
+```
+
+### Challenge 2
+
+### @video td/videos/blink-2
+
+Let's add the code to plot the mouth by plotting and unplotting `(1,4)`, `(2,4)` and `(3,4)`.
+
+```
+basic.forever(() => {
+    led.plot(2, 2)
+    led.plot(1, 1)
+    led.plot(3, 1)
+    led.plot(1, 4) 
+    led.plot(2, 4) 
+    led.plot(3, 4) 
+    basic.pause(200)
+    led.unplot(2, 2)
+    led.unplot(1, 1)
+    led.unplot(3, 1)
+    led.unplot(1, 4) 
+    led.unplot(2, 4) 
+    led.unplot(3, 4) 
+    basic.pause(200)
+})
+```
+
+### Challenge 3
+
+### @video td/videos/blink-3
+
+Let's keep using `led->plot` to convert the mouth into a smiley face.
+
+```` bitmatrix
+0 0 0 0 0
+0 1 0 1 0
+0 0 1 0 0
+1 0 0 0 1
+0 1 1 1 0
+````
+
+### Challenge 4
+
+Let's make it blink a bit faster. To do so, we need to reduce the amount of time used in ``basic->pause`` to ``100`` milliseconds.
+
+### Challenge 5
+
+Create your own image by changing the coordinates in `led->plot`!
+