Wow! Awesome to have the blurring on the top (clouds) and bottom (grass). I've never played with long exposure. Mostly I'm a casual photographer shooting pictures with my Pixel 2 phone. Apparently third-party camera app is capable of 4.1 seconds of exposure, but not longer due to a hardware limit. With 4 seconds, do you think I can accomplish anything worthwhile?
You can definitely get interesting shots with 4sec! You'll just need a tripod for your phone but try it out with people walking on the street and also water flow.