diff --git a/main.py b/main.py
index 093fd51..013f235 100644
--- a/main.py
+++ b/main.py
@@ -12,6 +12,9 @@ session = requests.Session()
 urls = queue.Queue()
 urls.put(INDEX_URL)
 
+# Create list to store visited sites
+visited = set([INDEX_URL])
+
 # Loop
 while not urls.empty():
     url = urls.get()
@@ -31,7 +34,12 @@ while not urls.empty():
     print(hrefs)
 
     # Add to queue
-    print("adding %d new urls"%len(hrefs))
+    print("found %d new urls"%len(hrefs), end="")
+    numAdded = 0
     for href in hrefs:
-        urls.put(href)
+        if href not in visited:
+            urls.put(href)
+            visited.add(href)
+            numAdded += 1
+    print(", of which %d new"%numAdded)