Clarify and simplify weather

remove two blank images (useless and slower than Null())
clarify in weather.rpy which are images directly shown on the screen and not just ingredients for the others
simplify the screen code

game/scripts/characters/cho/events/quidditch/gryffindor_match.rpy

@@ -1301,7 +1301,7 @@ label gryffindor_match:
     # Cuts to Cho who has taken off Gloves, goggles and leggings. Still wearing top, skirt, bra
     # Cho takes her top off
 
-     # Transition to Cho on her broom
+    # Transition to Cho on her broom
     $ cho.equip(cho_outfit_quidditch_gryffindor)
     $ cho.set_pose("broom")
     $ cho.animation = sprite_fly_idle

game/scripts/rooms/main_room/init.rpy

@@ -25,13 +25,12 @@ screen main_room():
     sensitive room_menu_active
 
     default objects = sorted(main_room.objects, key=lambda x: x.zorder)
-    default weather = "weather_[game.weather]"
 
     # Hotkeys
     if room_menu_active and game.day > 1 and not renpy.android:
         use hotkeys_main
 
-    add weather pos (430, 218) anchor (0.5, 0.5)
+    add "weather_[game.weather]" xycenter (430, 218)
 
     # Walls
     if game.daytime:

game/scripts/rooms/main_room/objects/weather.rpy

@@ -26,13 +26,13 @@ transform cloud_move:
     pause 7
     repeat
 
-image weather_clear = ConditionSwitch(
+image weather_clear = ConditionSwitch( # final
     "game.daytime", "images/rooms/main_room/weather/sky.webp",
     "game.moon", "images/rooms/main_room/weather/night_sky_moon.webp",
     "True", "images/rooms/main_room/weather/night_sky.webp",
     )
 
-image weather_overcast = ConditionSwitch(
+image weather_overcast = ConditionSwitch( # final
     "game.daytime", "images/rooms/main_room/weather/sky_overcast.webp",
     "game.moon", "images/rooms/main_room/weather/night_sky_moon_overcast.webp",
     "True", "images/rooms/main_room/weather/night_sky_overcast.webp",
@@ -71,7 +71,7 @@ image weather_cloudy_fx:
     pause 2
     repeat
 
-image weather_cloudy = Fixed("weather_clear", "weather_cloudy_fx", fit_first=True)
+image weather_cloudy = Fixed("weather_clear", "weather_cloudy_fx", fit_first=True) # final
 
 image weather_rain_fx:
     animation
@@ -83,7 +83,7 @@ image weather_rain_fx:
     pause.1
     repeat
 
-image weather_rain = Fixed("weather_overcast", "weather_rain_fx", fit_first=True)
+image weather_rain = Fixed("weather_overcast", "weather_rain_fx", fit_first=True) # final
 
 image weather_snow_fx:
     animation
@@ -109,7 +109,7 @@ image weather_snow_fx:
     pause.07
     repeat
 
-image weather_snow = Fixed("weather_overcast", "weather_snow_fx", fit_first=True)
+image weather_snow = Fixed("weather_overcast", "weather_snow_fx", fit_first=True) # final
 
 image weather_blizzard_fx:
     animation
@@ -135,7 +135,7 @@ image weather_blizzard_fx:
     pause.05
     repeat
 
-image weather_blizzard= Fixed("weather_overcast", "weather_blizzard_fx", fit_first=True)
+image weather_blizzard = Fixed("weather_overcast", "weather_blizzard_fx", fit_first=True) # final
 
 image weather_storm_fx:
     animation
@@ -143,7 +143,7 @@ image weather_storm_fx:
     parallel:
         animation
         pause 20
-        "images/rooms/main_room/weather/lightning_01.webp"
+        Null()
         pause.1
         "images/rooms/main_room/weather/lightning_02.webp"
         pause.1
@@ -151,15 +151,15 @@ image weather_storm_fx:
         pause.1
         "images/rooms/main_room/weather/lightning_04.webp"
         pause.1
-        "images/rooms/main_room/weather/lightning_05.webp"
+        Null()
         pause.1
         "images/rooms/main_room/weather/lightning_06.webp"
         pause.1
-        "images/rooms/main_room/weather/lightning_05.webp"
+        Null()
         pause.1
         "images/rooms/main_room/weather/lightning_06.webp"
         pause.1
-        "images/rooms/main_room/weather/lightning_05.webp"
+        Null()
         pause 20
         repeat
 
@@ -173,4 +173,4 @@ image weather_storm_fx:
         pause.1
         repeat
 
-image weather_storm = Fixed("weather_overcast", "weather_storm_fx", fit_first=True)
+image weather_storm = Fixed("weather_overcast", "weather_storm_fx", fit_first=True) # final