add a alien target and a shooter to hit it

I am actually really proud that i was able to figure out how to make the alien move
in every direction randomly.

proposal.md/targets.py

@@ -1,19 +1,46 @@
-class Asteroid:
-    character = 'O'
+from random import randint
+
+
+class Alien:
+    character = 'A'
 
     def __init__(self, position):
         self.position = position
 
     def play_turn(self, game):
+        
         width, height = game.board_size
-        if game.turn_number % 2 == 0: 
-            x, y = self.position
-            if y == height - 1: 
-                game.remove_agent(self)
-            else:
-                ship = game.get_agent_by_name('ship')
-                new_position = (x, y + 1)
-                if new_position == ship.position:
-                    game.end()
-                else:
-                    self.position = new_position
+
+        x, y = self.position
+
+        directions = [
+            (-1, 0),   # left
+            (1, 0),    # right
+            (0, -1),   # up
+            (0, 1),    # down
+            (-1, -1),  # up-left
+            (-1, 1),   # down-left
+            (1, -1),   # up-right
+            (1, 1)     # down-right
+        ]
+
+        possible_positions = []
+        for dx, dy in directions:
+            new_x = x + dx
+            new_y = y + dy
+
+            if 0 <= new_x < width and 0 <= new_y < height:
+                possible_positions.append((new_x, new_y))
+       
+        if not possible_positions:
+            return
+        random_index = randint(0, len(possible_positions) - 1)
+        new_position = possible_positions[random_index]
+
+        ship = game.get_agent_by_name('ship')
+
+        if ship is not None and new_position == ship.position:
+            game.end()
+        else:
+           
+            self.position = new_position