Clean up the snake code a bit

games/snake.py

@@ -4,12 +4,11 @@
 
 pew.init()
 screen = pew.Pix()
+
 game_speed = 4
-snake = [(0, 0)]
-dx = 1
-dy = 0
-apple_x = 4
-apple_y = 4
+snake = [(2, 4)]
+dx, dy = 1, 0
+apple_x, apple_y = 6, 4
 screen.pixel(apple_x, apple_y, 2)
 
 while True:
@@ -18,26 +17,26 @@
         screen.pixel(x, y, 1)
     x, y = snake[-1]
     screen.pixel(x, y, 3)
+
     pew.show(screen)
     pew.tick(1 / game_speed)
+
     keys = pew.keys()
     if keys & pew.K_UP and dy == 0:
-        dx = 0
-        dy = -1
+        dx, dy = 0, -1
     elif keys & pew.K_LEFT and dx == 0:
-        dx = -1
-        dy = 0
+        dx, dy = -1, 0
     elif keys & pew.K_RIGHT and dx == 0:
-        dx = 1
-        dy = 0
+        dx, dy = 1, 0
     elif keys & pew.K_DOWN and dy == 0:
-        dx = 0
-        dy = 1
+        dx, dy = 0, 1
     x = (x + dx) % 8
     y = (y + dy) % 8
+
     if (x, y) in snake:
         break
     snake.append((x, y))
+
     if x == apple_x and y == apple_y:
         screen.pixel(apple_x, apple_y, 0)
         apple_x, apple_y = snake[0]
@@ -55,4 +54,4 @@
     for dx in range(-8, text.width):
         screen.blit(text, -dx, 1)
         pew.show(screen)
-        pew.tick(1.0/8)
+        pew.tick(1 / 12)