Phyllis describes her painting as Walka. Walka is any meaningful mark or pattern and may be an image on a cave wall, on rock or on sand and has cultural and ritual significance. It is used on the body during inma or ceremony. This painting is a bright depiction of tjukula rockholes. Tjukula are found all across the desert. They are depressions in the rock that collect water after the rains. They vary in size, some are quite small while others are large enough to swim in and are almost like lakes. These rockholes are of high importance to Anangu as they provide water at many times of the year where other places cannot.