Assuming you would like tips on painting a brown snail on a rock:
One way to approach this project is to start by sketching out your snail on the rock. This can be done with a light pencil so that it is easy to erase if you make any mistakes. Once you have the basic shape of the snail down, you can begin to fill in the details.
To paint the snail, you will need to start with a light brown color. You can then add darker browns to create shadows and depth. Once the basic color is down, you can add other details like the snail's eyes and mucus. For the mucus, you can use a white paint and just add a small amount around the snail's mouth.
Painting a brown snail on a rock can be a fun and easy project. With a little bit of planning and some patience, you can create a beautiful and unique work of art.