More splitting and minor changes

Cloud.py

@@ -0,0 +1,30 @@
+"""
+Cloud entity class
+"""
+
+
+import pygame
+import random
+
+
+class Cloud(pygame.sprite.Sprite):
+    def __init__(self, mainGameClass):
+        pygame.sprite.Sprite.__init__(self)
+        self.image = pygame.Surface((random.randint(150, 350),
+                                     random.randint(50, 150)))
+        self.image.fill((random.randint(235, 255),
+                         random.randint(235, 255),
+                         random.randint(235, 255)))
+        self.rect = self.image.get_rect()
+        self.rect.center = (mainGameClass.getScreenWidth() + self.rect.width,
+                            mainGameClass.getScreenHeight()/2 -
+                            random.randint(100,
+                                mainGameClass.getScreenHeight()/2-100))
+        self.speed = random.randint(2, 4)*mainGameClass.getGameSpeed()
+
+
+    def update(self):
+        if (self.rect.x < -self.rect.width):
+            self.kill()
+
+        self.rect.x -= self.speed