diff --git a/settings.sh b/settings.sh
index 21dd3e1..b3da2aa 100755
--- a/settings.sh
+++ b/settings.sh
@@ -1289,6 +1289,7 @@ appearancesettings() {
     menu ':b Enable compositing'
     menu ':b 並V-Sync'
     menu ':b Blur'
+    menu ':b Flash windows on focus'
     menu ':b Autotheming'
     menu ':b Back'
 
@@ -1335,6 +1336,18 @@ appearancesettings() {
         fi
         appearancesettings
         ;;
+    *focus)
+        toggleiconf flashfocus "enable flashing windows on focus?" i
+        
+        pkill flashfocus >/dev/null |:
+        while pgrep flashfocus; do sleep 0.1; done
+        
+        if ! iconf -i flashfocus; then
+            instantinstall flashfocus || exit 1
+            flashfocus &
+        fi
+        appearancesettings
+        ;;
     *Wallpaper)
         wallpapersettings
         ;;