It is a method of drawing gold acrylic collar by putting it in a container with a pointed tip and squeezing it.
The background uses textured paper to add effect.
Sarasa patterns are abstract forms of flowers that have been popular for hundreds of years.
Even if it's not necessarily a realistic form, try drawing a free and abstract form using this technique.
Please draw a line while feeling the freedom of expression to your heart's content.
You can have a lot of fun.