put lessons back for Michael

docs/lessons/spinner/activity.md

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+# spinner activity
+
+Create an arrow that randomly points to a player. 
+
+### ~avatar avatar
+
+
+
+### ~
+
+Welcome! This guided tutorial will teach how to program a script that randomly points to a player. Let's get started!
+
+Let's begin by adding an `on shake` condition to know when the micro:bit is shaken.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    
+})
+```
+
+Now let's randomly generate a number from 0 to 3 so that we can randomly display an arrow in a given direction.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    let randomArrow = Math.random(4)
+    if (randomArrow == 3) {
+        basic.showLeds(`
+            . . # . .
+            . # # # .
+            # # # # #
+            . . # . .
+            . . # . .
+            `)
+    }
+})
+```
+
+
+
+Now let's handle each of the cases by displaying the appropriate arrow. (Let's display an up arrow if `random arrow` is 0.
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    let randomArrow = Math.random(4)
+    if (randomArrow == 3) {
+        basic.showLeds(`
+            . . # . .
+            . # # # .
+            # # # # #
+            . . # . .
+            . . # . .
+            `)
+    }
+    if (randomArrow == 2) {
+        basic.showLeds(`
+            . . # . .
+            . . # . .
+            # # # # #
+            . # # # .
+            . . # . .
+            `)
+    }
+})
+```
+
+
+Now let's handle the rest of the cases for `random arrow`.
+
+
+```blocks
+input.onGesture(Gesture.Shake, () => {
+    let randomArrow = Math.random(4)
+    if (randomArrow == 3) {
+        basic.showLeds(`
+            . . # . .
+            . # # # .
+            # # # # #
+            . . # . .
+            . . # . .
+            `)
+    }
+    if (randomArrow == 2) {
+        basic.showLeds(`
+            . . # . .
+            . . # . .
+            # # # # #
+            . # # # .
+            . . # . .
+            `)
+    }
+    if (randomArrow == 1) {
+        basic.showLeds(`
+            . . # . .
+            . # # . .
+            # # # # #
+            . # # . .
+            . . # . .
+            `)
+
+    }
+})
+```
+
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/lessons/spinner/challenges)!
+
+### ~
+