Heyy!
Here is the watermelon tutorial..
You will need:
Base coat
a light pink
a light green
a dark green
a black
What to do:- You need to apply your base coat, and then apply one coat of light pink on the whole nail. When that has dried use a thin paint brush and take your dark green to the end of your nail diagonally and fill in with green, outline the line with a white and then on the pink base coat that is visible apply with either a paint brush, tooth pick or even a dotting tool just add a few black dots as the seeds, on the green you need to take your light green and add two little lines.
And Just like that you have a lovely watermelon look! I will add pictures now!
Enjoy!
Xox.