sway-randomWallpaper: fixed flickering delaying killing old swaybg instances

homeManagerModules/desktop/sway/randomWallpaper.nix

@@ -12,20 +12,24 @@
 
     if [ -d "$directory" ]; then
         while true; do
-          for pid in ''${OLD_PIDS[@]}; do
-            kill $pid
-          done
-
-          OLD_PIDS=()
+          NEW_PIDS=()
 
           monitor=`${config.wayland.windowManager.sway.package}/bin/swaymsg -t get_outputs -p | grep Output | awk '{print $2}'`
           for m in ''${monitor[@]}; do
             random_background=$(ls $directory/*.{png,jpg} | shuf -n 1)
             ${pkgs.swaybg}/bin/swaybg -o $m -i $random_background &
-            OLD_PIDS+=($!)
+            NEW_PIDS+=($!)
           done
 
-          sleep 900
+          sleep 5
+
+          for pid in ''${OLD_PIDS[@]}; do
+            kill $pid
+          done
+
+          OLD_PIDS=$NEW_PIDS
+
+          sleep 895
         done
     fi
   '';