I've said that you can use your preferred eyeliner for this but it is best with liquid liner. It can be tricky at first but once you get the hang of it it can be really simple and quick :)
I start by filling in my lash line. It can feel strange when you first start doing it, but you get used to it lol.
Do the base of your flick. I will either use that line as a centre basis or as the lower line of the flick.
Now do the top line of your flick.
At the inner corner of your eye draw the top of your line, then follow it along in the middle and join it to the flick. You can do that in one or two parts.
Fill it in and you're done with your eyeliner :) if its looking a little uneven or gets smudged, dampen your cotton buds and clean it up. Sometimes it's best to wait for it to dry first.
For an extra 50's look put on your mascara and top them with false lashes. A little bit of red or pink coloured lipstick and you're done :)