Visualizes choosing k distinct items from n when order does not matter. The animation first builds an ordered pick (a k-permutation), then rapidly cycles through the k! different orderings of the same chosen items and collapses them into a single unordered subset token, reinforcing that combinations are permutations with order factored out. The bottom panel ties this to the formulas C(n,k)=n!/(k!(n-k)!) and C(n,k)=P(n,k)/k! with a numeric example (n=5,k=3).
Pure Canvas2D, retro blocky rendering via grid snapping. Time-based 4.2s cycle split into 3 eased segments (pick ordered -> forget order -> show formula/count). Includes a tiny 3x5 pixel font for consistent green-on-black labeling without external fonts.