diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b25c15b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*~
diff --git a/app.js b/app.js
index 4a52f3a..ed87c1e 100644
--- a/app.js
+++ b/app.js
@@ -30,12 +30,37 @@ function roomStatus(room, callback) {
         end.setSeconds(0);
 
         parsed.push({
-          title: lesson.getAttribute('title'),
+          title: lesson.getAttribute('title').trim(),
           start: start,
           end: end
         });
       }
 
+      let start = new Date();
+      start.setHours(0);
+      start.setMinutes(0);
+      start.setSeconds(0);
+
+      let s = start;
+
+      let end = new Date();
+      end.setHours(23);
+      end.setMinutes(59);
+      end.setSeconds(0);
+
+      const holes = [];
+      for (let i = 0; i <= parsed.length; i++) {
+        const time = i == parsed.length ? end : parsed[i].start;
+        if (time > s) {
+          holes.push({title: "Unassigned", start: s, end: time});
+        }
+        if (time != end) {
+          s = parsed[i].end;
+        }
+      }
+
+      parsed.push(...holes);
+
       resolve(parsed);
     });
     xhr.open('GET', URL + room);
@@ -77,16 +102,22 @@ function colorRoom(roomTitle, node, time = NOW /* QuantumLeap */) {
     return
   }
 
-  const currentLecture = data.filter(d => d.start < time && d.end > time)[0];
-  const isFree = currentLecture === void(0);
+  const currentLecture = data.filter(d => d.start < time && d.end > time)[0] || null;
+  const isFree = !!currentLecture && !!currentLecture.title &&
+    currentLecture.title === "Overflow";
+  console.log(roomTitle, isFree);
   const block = document.getElementById(roomTitle);
 
-  block.className = block.className.replace(" room-in-use", "")
-    .replace(" room-free", "");
-  block.className += isFree ? " room-free" : " room-in-use";
+  block.className = block.className
+    .replace(" room-in-use", "")
+    .replace(" room-free", "")
+    .replace(" room-unassigned", "");
+  block.className += isFree ? " room-free" :
+    currentLecture.title === "Unassigned" ? " room-unassigned" : " room-in-use";
 
-  block.querySelector('p').innerHTML = isFree ? 'Free' :
-    currentLecture.title + "<br> (" + formatTime(currentLecture.start) + " - " +
+  block.querySelector('p').innerHTML = isFree ? 'Free (overflow)' :
+    (currentLecture ? currentLecture.title : "Unassigned") +
+    "<br> (" + formatTime(currentLecture.start) + " - " +
     formatTime(currentLecture.end) + ")";
 }
 
@@ -99,6 +130,7 @@ async function buildRoomMarkup(roomTitle) {
   const list = room.querySelector('.list');
 
   for (const d of data) {
+    if (d.title === "Unassigned" || d.title === "Overflow") continue;
     const slot = document.importNode(SLOT_TEMPLATE.content, true);
     const title = slot.querySelector('.title');
     title.innerHTML = d.title;
diff --git a/assets/index.css b/assets/index.css
index 1681145..c05f48e 100644
--- a/assets/index.css
+++ b/assets/index.css
@@ -169,7 +169,7 @@ input[type="range"]::-moz-range-progress {
 
 /* Schedule */
 
-.schedule {
+.schedule, .warning {
   border: #00000033 solid 1px;
   border-radius: 6px;
   box-shadow: 0 1px 3px #0000001a;
@@ -229,13 +229,21 @@ input[type="range"]::-moz-range-progress {
 
 
   .room-free {
-    background-color: #3FE1B0;
+    background-color: #3fe1b0;
   }
 
   .room-free:hover {
     box-shadow: 0 4px 8px #b3ffe333;
   }
 
+  .room-unassigned {
+    background-color: #fe8a4f;
+  }
+
+  .room-unassigned:hover {
+    box-shadow: 0 4px 8px #b3fe8a4f;
+  }
+
   .room-in-use {
     background-color: #ff6a75;
   }
@@ -250,7 +258,7 @@ input[type="range"]::-moz-range-progress {
     box-shadow: 0 0 0 #00000000;
   }
 
-  .schedule {
+  .schedule, .warning {
     border: #384047 solid 1px;
     background-color: #2d3339;
     box-shadow: 0 0 0 #00000000;
diff --git a/index.html b/index.html
index fae207f..d7fdd70 100644
--- a/index.html
+++ b/index.html
@@ -90,6 +90,14 @@
       </template>
     </div>
 
+    <div class="warning">
+      <h3>Updated to latest Decanato rules about room usage according to
+      COVID-19 regulations.</h3> Rooms that are marked with "Free (overflow)"
+    (here in
+      green) can be used for unbooked activities (e.g. studying or working on
+      homework)
+    </div>
+
     <script src='app.js'></script>
   </body>
 </html>