feat(tractor): rotate tractor on left-right arrow keys

src/tractor.py

@@ -43,9 +43,9 @@ class Tractor(pygame.sprite.Sprite):
     def update(self):
         keys = pygame.key.get_pressed()
         if keys[pygame.K_LEFT]:
-            self.move('left')    
+            self.rotate('left')    
         if keys[pygame.K_RIGHT]:
-            self.move('right')
+            self.rotate('right')
         if keys[pygame.K_UP]:
             self.move('up')
         if keys[pygame.K_DOWN]:
@@ -103,3 +103,38 @@ class Tractor(pygame.sprite.Sprite):
 
         return neighbors
 
+
+    def rotate(self, rotate):
+        match (self.direction, rotate):
+            case ("north", "left"):
+                self.image = pygame.image.load('images/tractor/west.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'west'
+            case ("north", "right"):
+                self.image = pygame.image.load('images/tractor/east.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'east'
+            case ("east", "right"):
+                self.image = pygame.image.load('images/tractor/south.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'south'
+            case ("east", "left"):
+                self.image = pygame.image.load('images/tractor/north.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'north'
+            case ("south", "right"):
+                self.image = pygame.image.load('images/tractor/west.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'west'
+            case ("south", "left"):
+                self.image = pygame.image.load('images/tractor/east.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'east'
+            case ("west", "left"):
+                self.image = pygame.image.load('images/tractor/south.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'south'
+            case ("west", "right"):
+                self.image = pygame.image.load('images/tractor/north.png').convert_alpha()
+                self.image = pygame.transform.scale(self.image, (TILE_SIZE, TILE_SIZE))
+                self.direction = 'north'