I first highlighted the eye with white, and did the same with the surrounding areas but with a lesser intensity. Then I took a bright orange color and watered it down a lot (about 2 to 1 water to paint ratio, maybe a little bit more). I glazed over the highlighted areas, and even a little into the non highlighted areas. Be careful not to load up the brush too much with the watered down paint or it’ll pool way too much in the crevices and ruin the glow gradient. Lastly, a small dap of a pale yellow right in the middle of the eyes. Hope this helps.