diff --git a/experiment.t b/experiment.t
index 9a31a1b..fe1a4bd 100644
--- a/experiment.t
+++ b/experiment.t
@@ -49,10 +49,11 @@ gameMain: GameMainDef
 
 #include "src/actor/pc.t"
 
-#include "src/action/repair.t"
-
-#include "src/item/_bandage.t"
 #include "src/item/interior.t"
+#include "src/item/_atmosphere.t"
+
+#include "src/action/repair.t"
+#include "src/item/_bandage.t"
 
 /* rooms */
 
diff --git a/src/item/_atmosphere.t b/src/item/_atmosphere.t
new file mode 100644
index 0000000..b091d4c
--- /dev/null
+++ b/src/item/_atmosphere.t
@@ -0,0 +1,15 @@
+modify Room
+  atmosphereList : ShuffledEventList {
+    [
+      'The lamps blinked several times in a row.\n',
+      'The walls vibrated slightly, but it was quickly over.\n',
+      'There was a noise under the floor.\n',
+      'Suddenly there was a series of clicks behind the panels.\n',
+      ' Illegible voices came from
+        hidden speakers and soon died away.\n',
+      ' Snatches of conversation came from the speakers,
+        but the words were indecipherable.\n'
+    ]
+    eventPercent = 30
+  }
+;
diff --git a/src/item/interior.t b/src/item/interior.t
index 3aa5029..ef01256 100644
--- a/src/item/interior.t
+++ b/src/item/interior.t
@@ -27,3 +27,8 @@ MultiLoc, Decoration
     pinkRoom
   ]
 ;
+
+Decoration
+  'hidden speaker*speakers'
+  'speakers'
+;
diff --git a/src/room/cyanRoom.t b/src/room/cyanRoom.t
index dd92f0b..244bed5 100644
--- a/src/room/cyanRoom.t
+++ b/src/room/cyanRoom.t
@@ -20,9 +20,9 @@ cyanRoom: Room
 
   north = yellowRoom
   east = operatingRoomDoorOutside
-  west: FakeConnector {"
-    Striped safety tape blocks your way.
-  "}
+  west: FakeConnector {
+    "Striped safety tape blocks your way."
+  }
 ;
 
 + Decoration
@@ -44,10 +44,16 @@ cyanRoom: Room
   -> operatingRoomDoor
   'armored operating door*doors'
   'armored door'
-  " Armored door marked <q>Operating room</q>
+  " It's an armored door marked <q>Operating room</q>
     and a massive mechanical locking device with a circle keyhole.
     <br>Next to the door is a sign <q>Restricted area</q>.<br>"
   keyList = [ labKey ]
   knownKeyList = [ labKey ]
   specialNominalRoomPartLocation = defaultEastWall
 ;
+
+++ Decoration
+  'massive mechanical locking device'
+  'locking device'
+  "It's a part of an armored door. "
+;
diff --git a/src/room/orangeRoom.t b/src/room/orangeRoom.t
index 0da258e..2e7a364 100644
--- a/src/room/orangeRoom.t
+++ b/src/room/orangeRoom.t
@@ -54,12 +54,6 @@ orangeRoom: DarkRoom
   }
 ;
 
-+ Decoration
-  'neon lamp*lamps'
-  'neon lamps'
-  "Ordinary neon lamps emit cold light. "
-;
-
 /* Content */
 
 + RoomPartItem, Decoration