Innovation idea for "To-Do" app

Dear Developers of "To-Do" application,

Please add a additional steps under steps in this application. 

Now its hard to add some to-do things in a long period of time. With this method it could be used for that. Current list can be "scheduled", "in progress", "done" and "cancelled". Steps can be too changed in it's status. By clicking a "done" button, a list could appear with statuses. 

Pictures below post:

Best Regards, 

Adrlut