Tricia Altman's round arm needs to prepare the corresponding brush, paint and paper first. Then, you can draw the arm of the ring according to the following steps.

1. First, draw a big circle with fine strokes, the center of the circle is located in the center of drawing paper, and draw some small points on the circumference to represent the bracket structure of the ring arm.

2. Then, draw some arcs on the ring with a fine pen to show the edge-sticking structure of the ring arm.

3. Then, paint a layer of gold on the arm of the ring with pigment to simulate the effect in the original film.

4. Finally, in the center of the circular arm, draw the outline of a five-pointed star with a fine pen, which represents Triga's weapon.