Rainbow, Pink & Blue. In that order I'll use them
Apply a coat of the lightest colour
Begin with the pink nail polish you'll add it to the make-up applicator. Then you start painting the nail
Once you finished with all the fingers use the darkest color, in this case the blue
Than add a drop of of top coat in the nail to paste the shiny stones
I suggest to use three per nail in the same colors you used of the nail polish
Finally a coat of tope coat.