Updated stylix schema

themes/background-test.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 for i in $(ls -d */);
 do
-  if curl --output /dev/null --silent --head --fail $(cat $i/backgroundurl.txt); then
+  if curl --output /dev/null --silent --head --fail $(cat $i/default.nix | grep "backgroundUrl" | cut -d'"' -f 2); then
     echo "$i background successfully downloads";
   else
     echo -e "\033[0;31m$i background download fails\033[0m"