Automating Media Queries

When you select a screen size, any changes you make will automatically add the @media needed to the code, it would be pretty simple and fast speeding (IMO) the most time consuming activity when creating a site… 1 click for all changes in the chosen size. The same happens with hover, active, etc … you select the button state and already can edit the style it creates :hover sutomatic… creating and copying a brand new class every time is like and put then in the right @media feels very cumbersome …