Add random game generator example and update readme

README.md

@@ -1,7 +1,35 @@
 # Uno
 
-Some Python code to model the card game Uno
+Some unit tested Python code to model the card game Uno
 
 ## Rules
 
 https://en.wikipedia.org/wiki/Uno_(card_game)#Official_rules
+
+## Usage
+
+An example auto-generated game of 5 players:
+
+```python
+from uno import UnoGame, COLORS
+import random
+
+game = UnoGame(5)
+
+while game.is_active:
+    player = game.current_player
+    player_id = player.player_id
+    if player.can_play(game.current_card):
+        for i, card in enumerate(player.hand):
+            if game.current_card.playable(card):
+                if card.color == 'black':
+                    new_color = random.choice(COLORS)
+                else:
+                    new_color = None
+                print("Player {} played {}".format(player, card))
+                game.play(player=player_id, card=i, new_color=new_color)
+                break
+    else:
+        print("Player {} picked up".format(player))
+        game.play(player=player_id, card=None)
+```

random_game.py

@@ -0,0 +1,28 @@
+from uno import UnoGame, COLORS
+import random
+
+players = random.randint(2, 15)
+game = UnoGame(players)
+
+print("Starting a {} player game".format(players))
+
+count = 0
+while game.is_active:
+    count += 1
+    player = game.current_player
+    player_id = player.player_id
+    if player.can_play(game.current_card):
+        for i, card in enumerate(player.hand):
+            if game.current_card.playable(card):
+                if card.color == 'black':
+                    new_color = random.choice(COLORS)
+                else:
+                    new_color = None
+                print("Player {} played {}".format(player, card))
+                game.play(player=player_id, card=i, new_color=new_color)
+                break
+    else:
+        print("Player {} picked up".format(player))
+        game.play(player=player_id, card=None)
+
+print("{} player game - {} cards played".format(players, count))