Check root and make sure we are in the right dir

bin/numix_color_blue

@@ -1,5 +1,13 @@
 #!/bin/bash
 
+# Make sure only root can run our script
+if [[ $EUID -ne 0 ]]; then
+   echo "This script must be run as root" 1>&2
+   exit 1
+fi
+
+cd /usr/share/themes
+
 if [ ! -d "Numix Daily" ]; then
     echo "Numix theme not found!"
     exit 1