Minor changes

snake/snake.py

@@ -4,10 +4,13 @@ import sys, pygame
 
 class Snake:
 
-    def __init__(self, grid_width=50,grid_height=50, grid_pts=15):
+    def __init__(self, length=10,grid_width=50,grid_height=50, grid_pts=15,fps=2):
         self.grid_width=grid_width
         self.grid_height=grid_height
         self.grid_pts=grid_pts
+        self.fps=fps
+        self.snake=[(0,0)]*length
+        self.direction=3 # Like clock (12=up, 3=right, 6=bottom, 9=left)
         pygame.init()
         self.screen=pygame.display.set_mode((grid_width*grid_pts,grid_height*grid_pts))
 
@@ -15,7 +18,25 @@ class Snake:
         rect=pygame.Rect(self.grid_pts*x, self.grid_pts*y, self.grid_pts, self.grid_pts)
         pygame.draw.rect(self.screen,color,rect, 0)
 
+    def move(self):
+        head=self.snake[0]
+        if self.direction==3:
+            head=(head[0]+1,head[1])
+        if len(self.snake)>1:
+            tmp=head
+            for i in range(1,len(self.snake)):
+                newtmp=self.snake[i]
+                self.snake[i]=tmp
+                tmp=newtmp
+        self.snake[0]=head
+
+
+    def draw_snake(self):
+        for elt in self.snake:
+            self.draw_pts(elt[0],elt[1])
+
     def run(self):
+        clock = pygame.time.Clock()
         while True:
             for event in pygame.event.get():
                 if event.type == pygame.QUIT: 
@@ -23,9 +44,10 @@ class Snake:
                     sys.exit()
             
             self.screen.fill((0,0,0))
-            self.draw_pts(1,1)
-            self.draw_pts(0,0,color=(95,1,255))
+            self.draw_snake()
+            self.move()
             pygame.display.flip()
+            clock.tick(self.fps)
 
 
 game=Snake()