This is just a quick little look i did one day that I ended up really liking, along with a bunch of other people.so i thought i would share it.
The picture below is after a couple of hours so the liquid black liner has faded some. It hadn’t occurred to me to take a picture after i had first drawn the liner on.
Some Kind of Liquid Liner in black
Smashbox Always Sharp 3D Liner in Seafoam
Step 1: lightly smudge and blend the colored liner over the upper lid near the lash line until the color is diffused.
Step 2: paint on the liquid as shown. I started with a mostly linear stroke that slanted along my bottom lash line, and extended it some. I then drew a thin line on my upper lid and made the thin wing to be mostly parallel to the bottom extension. Lastly, I connected top and bottom with the black diagonal asking my outer corner.
Step 3: finish off with the colored liner, filling in the gap in the outer corner and inner half of the lower lash line as well as the inner corner (as a highlight). I blended the green a bit over into the black.
Step 4: make adjustments as needed (darkening the black liner, thickening/lengthening lines, more blending, etc.)