diff --git a/rsync-T520-2-bfds/last.run b/rsync-T520-2-bfds/last.run
new file mode 100644
index 0000000..f438ad5
--- /dev/null
+++ b/rsync-T520-2-bfds/last.run
@@ -0,0 +1 @@
+the age of this file is the last time the rsync was running
diff --git a/rsync-T520-2-bfds/rsync_t520_d3v_on_bfds.sh b/rsync-T520-2-bfds/rsync_t520_d3v_on_bfds.sh
index 97fca64..b2ec5c4 100755
--- a/rsync-T520-2-bfds/rsync_t520_d3v_on_bfds.sh
+++ b/rsync-T520-2-bfds/rsync_t520_d3v_on_bfds.sh
@@ -1,5 +1,32 @@
 #!/bin/zsh
 
+todo zeitabhängiger ablauf
+
+## create last.run if not exist
+# if [ ! -f "last.run" ]
+#   echo "the age of this file is the last time the rsync was running" > "last.run"
+
+# # check if the more than one week was since the last run
+
+
+# #funtion arguments -> filename to comapre against curr time
+# function comparedate() {
+#   MAXAGE=$(bc <<< '60*60*24*7') # seconds in one week
+#   # file age in seconds = current_time - file_modification_time.
+#   FILEAGE=$(($(date +%s) - $(stat -c '%Y' "$1")))
+#   test $FILEAGE -lt $MAXAGE && {
+#       echo "$1 is less than 28 hours old."
+#       return 0
+#   }
+#   echo "$1 is older than 28 hours seconds."
+#   return 1
+# }
+
+# #sample usage of function test if file /tmp/test.sh is older than 28 hours or not
+# comparedate /tmp/test.sh
+#######END_SCRIPT#########
+
+
 exclude='--exclude-from=rsync_exclude_list'
 #includefile='--include-from=rsync_include_list'