Fix typos/small mistakes

lighting.py

@@ -41,14 +41,14 @@ class ColorManager(Thread):
             self.current_rand = -randint(1, 8)
             self.current_color = Color(80, 255, self.current_color.blue)
         elif self.current_color.green + self.current_rand < 0:
-            rand = randint(1, 8)
+            self.current_rand = randint(1, 8)
             self.current_color = Color(0, 255, self.current_color.blue)
         else:
-            self.current_color.green += rand
+            self.current_color.green += self.current_rand
             self.current_color.red = 255
             self.current_color.blue = self.unscaled_blue * self.current_color.green//255
         if self.unscaled_blue < 100 :
-            self.unscaled_blue++
+            self.unscaled_blue += 1
 
     def fade(self):
         if self.current_color.red > 0: