Add locker to the tirdRoom

items/locker.t

@@ -0,0 +1,57 @@
+locker: LockableContainer, Fixture
+  'locker'
+  'locker'
+  "A standard metal locker stands in the corner, slightly worn but sturdy.
+  Its surface is a matte, muted gray with faint scratches and small dents,
+  evidence of years of use. You could see an attached keypad.\n "
+  location = thirdRoom
+  isListed = true
+  initiallyLocked = true
+;
+
++ Wearable
+  'pair/sock*socks'
+  'pair of socks'
+  "A pair of white socks. "
+  dobjFor (Wear) {
+    verify () {
+      illogical('It turned out that the socks are the wrong size for you.');
+    }
+  }
+;
+
+/* */
+
+modify VerbRule(SetTo)
+  ('press' | 'input') singleLiteral ('on' | 'with') singleDobj
+  : /* empty */
+;
+
+numpad: Dial, Component
+  'electronic locking device/numpad/keyboard/keypad'
+  'numpad keyboard'
+  "An electronic device with a numeric keypad and a small 4-digit display.\n
+  Apparently, you can type a passcode on this keyboard to open the locker. "
+  location = thirdRoom
+
+  makeSetting(val) {
+    curSetting = val is in (secondRoom.wallCode)
+      ? val
+      : '0';
+  }
+
+  dobjFor (TypeLiteralOn) remapTo(SetTo, self, OtherObject)
+
+  dobjFor (SetTo) {
+    action () {
+      inherited;
+      if (curSetting == secondRoom.wallCode) {
+        locker.makeLocked(nil);
+        locker.makeOpen(true);
+        "The locker opened with a click. ";
+      } else {
+        "You heard an annoying sound and a red light flashed on the keypad. ";
+      }
+    }
+  }
+;