Inspired by this:
I spent some time making this. It is a bit convoluted but if you feel like it, you can make your own. Here is the link to make your own: Link Unfortunately I do not know how to prevent people from saving edits, so if it becomes broken I will have to re-up it. You can save the thing and generate your own, and then no matter who edits it will generate the right code. In fact I recommend you either save to your own Google Spreadsheet or as a real Excel file, otherwise it might crash when two users use at once. And a quick example: 
I spent some time making this. It is a bit convoluted but if you feel like it, you can make your own. Here is the link to make your own: Link Unfortunately I do not know how to prevent people from saving edits, so if it becomes broken I will have to re-up it. You can save the thing and generate your own, and then no matter who edits it will generate the right code. In fact I recommend you either save to your own Google Spreadsheet or as a real Excel file, otherwise it might crash when two users use at once. And a quick example: 





What's Bounce2?







