I released Camera Shake source file for Game Maker Studio 1.4: https://samuelsousa.itch.io/camera-shake
Aside to being easy to use, edit and adapt to your projects; here a some other features:
- Allows customisation for harder or smoother Camera Shakes;
- Each shake has 2 moments, allowing for very distinct type of shakes;
- Shakes your camera and leaves it where it is supposed to be;
Hope you find it useful!