finished the mechanism for setting the language

levels/en_EN/intro/remote

@@ -0,0 +1,52 @@
+title = Working together
+cards = pull commit-auto push
+
+[description]
+
+Let's add your name to our list of students!
+
+I already have a second commit of it in my time machine - let's work together!
+
+[cli]
+
+To go back to old commands, you can press arrow up and down. That way, you don't have to type in long commands twice.
+
+[congrats]
+
+Welcome to time travel school! :) I'll see you for your first class tomorrow!
+
+[setup]
+
+echo "~ List of current students ~" > students
+git add .
+git commit -m "Initial version"
+git push -u teacher main
+
+git update-ref -d refs/remotes/teacher/main
+
+[setup teacher]
+
+git reset --hard main
+
+echo " 
+- Sam
+- Alex" >> students
+
+git add .
+git commit -m "Added two students"
+
+[win]
+
+# Get the second commit from your teacher using `git pull`.
+test "$(git log --oneline teacher/main | wc -l)" -ge 2
+
+# Add your name to the list of students
+test "$(cat students |wc -l)" -ge 5
+
+# Commit your result.
+test "$(git show main:students |wc -l)" -ge 5
+
+[win teacher]
+
+# And use `git push` to send it to your teacher!
+test "$(git show main:students |wc -l)" -ge 5