Completed Tasks in Board VIew Layout

I have just created a Board View layout for the project me and my team are working on and find it very user friendly and more organised than the list layout. However, I would like to suggest an enhancement for the board view layout.

Say you have a column name “Completed”, it would be a brilliant feature if the tasks marked “Completed” automatically moved to the “Completed” column without having to drag them manually. Alternatively, the colour scheme to identify the the category of each task such as green for completed, amber for in progress, red for overdue e.t.c