put lessons back for Michael

docs/lessons/game-of-chance.md

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+# game of chance blocks lesson
+
+create an answering machine on the BBC micro:bit
+
+## Topic
+
+Game Library
+
+## Quick Links
+
+* [activity](/lessons/game-of-chance/activity)
+* [challenges](/lessons/game-of-chance/challenges)
+
+## Prior learning / place of lesson in scheme of work
+
+Learn how to creating a message with a **game over** to write your message. We will be learning how to create a message using show string and on button pressed.
+
+## Documentation
+
+
+```cards
+game.gameOver()
+basic.showString("Hello!")
+input.onButtonPressed(Button.A, () => {})
+```
+
+## Objectives
+
+* learn how to use the game library
+* learn how to show a string on the LED screen one character at a time
+* learn how to use to register an event handler that will execute whenever an input button is pressed