She loves fashion and coding. So when prom season came around, she had the perfect idea for a DIY dress. Last year, the world was awed by Zac Posen's light-up Met Gala dress for Claire Danes. Among its fans was 17-year-old Claire Smith, a homeschooled high school senior and budding engineer from Maryland. Smith was inspired by Posen's dress and decided to try to make her own version.