[wpaperd] Adds wallpaper rotation

home-manager/features/wallpaper.nix

@@ -10,6 +10,12 @@ monitors:
     settings = builtins.listToAttrs (map (mon: {
       name = mon;
       value = { path = "~/Pictures/Wallpaper/${mon}"; };
-    }) monitors);
+    }) monitors) // {
-  };
+      default = {
+        duration = "1h";
+        mode = "center";
+        sorting = "random";
+      };
+    };
+   };
 }