Amy “SailorHG” Wibowo helps a witch calculate moon phases by using JavaScript and proving the algorithm from first principles. The talk is part of Amy’s efforts to make coding and engineering more accessible, which she also tackles through her BubbleSort Zines project. Check out BubbleSort Zines: https://shop.bubblesort.io/ JSConf Hawaii is returning in 2020. Learn more at https://www.jsconfhi.com/