diff --git a/users/guanranwang/home-manager/applications/bspwm/default.nix b/users/guanranwang/home-manager/applications/bspwm/default.nix
index b9c6289..e387d2d 100644
--- a/users/guanranwang/home-manager/applications/bspwm/default.nix
+++ b/users/guanranwang/home-manager/applications/bspwm/default.nix
@@ -16,7 +16,7 @@
       enable = true;
       startupPrograms = [
         "pgrep -x sxhkd > /dev/null || sxhkd"
-        "pgrep -x feh > /dev/null || feh --bg-fill ~/.local/share/backgrounds/wallpaper1.png"
+        "pgrep -x feh > /dev/null || feh --bg-fill ~/.local/share/backgrounds/aqua.png"
       ];
       monitors = {
         eDP-1 = ["I" "II" "III" "IV" "V" "VI" "VII" "VIII" "IX" "X"];
diff --git a/users/guanranwang/home-manager/applications/sway/default.nix b/users/guanranwang/home-manager/applications/sway/default.nix
index faae86c..5ac0d4f 100644
--- a/users/guanranwang/home-manager/applications/sway/default.nix
+++ b/users/guanranwang/home-manager/applications/sway/default.nix
@@ -68,7 +68,7 @@
       };
       output = {
         eDP-1 = {
-          bg = "~/.local/share/backgrounds/wallpaper1.png fill";
+          bg = "~/.local/share/backgrounds/aqua.png fill";
         };
       };
 
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/default.nix b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/default.nix
index 77bc146..bf0fff9 100644
--- a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/default.nix
+++ b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/default.nix
@@ -1,6 +1,24 @@
-_: {
-  xdg.dataFile."backgrounds" = {
-    source = ./wallpapers;
-    recursive = true;
+{pkgs, ...}: {
+  xdg.dataFile = {
+    ### Local
+    "backgrounds/unixcloud.jpg".source = ./wallpapers/unixcloud.jpg; # https://www.deviantart.com/georgegach/art/Unix-Cloud-818259008
+
+    ### Online
+    "backgrounds/aqua.png".source = pkgs.fetchurl {
+      url = "https://github.com/mashumarodesu/dots/blob/master/Assets/Aqua.png?raw=true"; # https://www.pixiv.net/en/artworks/106654974
+      hash = "sha256-JIat75RKz48a0BtniJBR1ifEk0tkkrHUrLPAHAz3Z1o=";
+    };
+    "backgrounds/summer.jpg".source = pkgs.fetchurl {
+      url = "https://images.hdqwalls.com/wallpapers/anime-couple-on-bicycle-1u.jpg"; # https://www.pixiv.net/en/artworks/49983419
+      hash = "sha256-J6ckWjfPyviUsDfswOYVPB4UEOBQ63Yr5yeJtOd9/2k=";
+    };
+    "backgrounds/macos-mojave-day.jpg".source = pkgs.fetchurl {
+      url = "https://media.idownloadblog.com/wp-content/uploads/2018/06/macOS-Mojave-Day-wallpaper.jpg";
+      hash = "sha256-DtIaO7jWkhdU4EqJL8QfAaaajRcME79/O8szk1po/Go=";
+    };
+    "backgrounds/macos-mojave-night.jpg".source = pkgs.fetchurl {
+      url = "https://media.idownloadblog.com/wp-content/uploads/2018/06/macOS-Mojave-Night-wallpaper.jpg";
+      hash = "sha256-Zv7uvjSNACpI2Yck22bsA8gwVaju2Yght7y09xko9xw=";
+    };
   };
 }
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/Mojave Night.jpg b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/Mojave Night.jpg
deleted file mode 100755
index 427545a..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/Mojave Night.jpg and /dev/null differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/unixcloud.jpg b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/unixcloud.jpg
new file mode 100644
index 0000000..23b3cfe
Binary files /dev/null and b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/unixcloud.jpg differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper1.png b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper1.png
deleted file mode 100755
index 6f92991..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper1.png and /dev/null differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper2.jpg b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper2.jpg
deleted file mode 100755
index 9ae0a5b..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper2.jpg and /dev/null differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper3.jpg b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper3.jpg
deleted file mode 100755
index 2e4d775..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper3.jpg and /dev/null differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper4.png b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper4.png
deleted file mode 100755
index a01145e..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper4.png and /dev/null differ
diff --git a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper5.png b/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper5.png
deleted file mode 100755
index 65cd704..0000000
Binary files a/users/guanranwang/nixos/profiles/device-type/desktop/home/wallpapers/wallpapers/wallpaper5.png and /dev/null differ