Start with a base coat and paint all nails;

i started with white (so it was brighter) then hot pink,

using either a paintbrush/nail pen/toothpick etc

paint a single black line in the corner of your nails

then from that black line paint three lines evenly spaced almost to the edge of your nail

connect the lines using a curved shape/ half circle at the top and add extra lines for the sides,

add an extra line on the other side of the first line in the middle

paint the top corner of your nails black

add white dots onto the top black corner

use a clear top coat to make it last longer; also paint the tip of your nails to stop it from easily chipping