First, I cut up a cotton pillowcase from the 99c Only store. Starboy placed rice, cooked noodles, onion skin, spinach leaves and barley on it, then placed the raw egg in the center.
After bringing the water to a boil, we let it simmer for 15-17 minutes. I forgot to add 2 Tbsp. vinegar to the water, which will set the dye. This worked out okay for us, but I'd recommend adding it.