Migrate docs from the other repo

docs/reference/loops/for.md

@@ -0,0 +1,28 @@
+# For
+
+Repeat code a preset number of times. #docs #for #endfor #language
+
+### @parent blocks/language
+ 
+
+Repeat code a fixed number of times.
+
+### Block Editor
+
+![](/static/mb/events-0.png)
+
+The Block Editor *for* loop is different than the Touch Develop *for* loop in an important way. The above for loop will iterate *five* times, with the loop variable *i* taking on values 0, 1, 2, 3, and 4. The Touch Develop for loop shown below will iterate four times:
+
+```
+for (let k = 0; k < 4; k++) {
+}
+```
+
+### Lessons
+
+[looper](/microbit/lessons/looper)
+
+### See also
+
+[while](/microbit/reference/loops/while), [if](/microbit/blocks/if)
+

docs/reference/loops/repeat.md

@@ -0,0 +1,21 @@
+# Repeat
+
+Repeat code a preset number of times. #docs #repeat #language
+
+Repeat code a fixed number of times.
+
+### Block Editor
+
+![](/static/mb/blocks/contents-0.png)
+
+### Touch Develop
+
+Touch Develop has no `repeat` loop. Instead you can used a for loop
+
+```
+for (let i = 0; i < 5; i++) {
+}
+```
+
+The loop above will repeat five (5) times.
+

docs/reference/loops/while.md

@@ -0,0 +1,43 @@
+# While
+
+Repeat code in a loop while a condition is true. #docs #while #language
+
+### @parent blocks/language
+ 
+
+Repeat code while a [Boolean](/microbit/reference/types/boolean) `condition` is true.
+
+### ~hide
+
+```
+let condition = false
+```
+
+### ~
+
+### Block Editor
+
+![](/static/mb/string-0.png)
+
+The while loop has a *condition* that evaluates to a [Boolean](/microbit/reference/types/boolean) value. After the `do` keyword, add the code that you want to run while the `condition` is `true`. The while loop concludes with `end while`.
+
+The condition is tested before any code runs. Which means that if the condition is false, the code inside the loop doesn't execute.
+
+### Example: diagonal line
+
+The following example uses a while loop to make a diagonal line on the LED screen (points `0, 0`, `1, 1`, `2, 2`, `3, 3`, `4, 4`).
+
+// index is set to 4
+
+![](/static/mb/blocks/var-10.png)
+
+// subtract 1 from `index` each time through loop
+
+### Lessons
+
+[rotation animation](/microbit/lessons/rotation-animation)
+
+### See also
+
+[on button pressed](/microbit/reference/input/on-button-pressed), [for](/microbit/reference/loops/for), [if](/microbit/blocks/if), [forever](/microbit/reference/basic/forever)
+