You will need clean nails, without base (the base can to ruin the next step)
Start making a white line in the nails, like this...
Or if your nails were curly making a white line like this...
Waiting the polish to dry
Then pick out twice the white transparent polish and clean around with the wood stick clean and dry
To clean around with cotton, acetone and wood stick
Finally with the top coat polish. THAT'S ALL!!!