Place a piece of cardboard inside the shirt and secure with binder clips around the edge.
Using the provided pattern and chalk, draw the koi fish onto the center of the shirt. (One fish should face one direction and the other in the opposite direction.)
Paint one fish with warm hues: Tangerine, White, Red Pepper, and Lamp Black, and the other with cool hues: Baby Blue Deep, Dioxazine Purple, Fuchsia, and Ocean Blue.
Add the dorsal fin in White and water speckles in a mix of colors such as Tangerine, Fuchsia, Ocean Blue, and Baby Blue Deep.