diff --git a/codewars/6kyu/function-composition/koronya.js b/codewars/6kyu/function-composition/koronya.js
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+++ b/codewars/6kyu/function-composition/koronya.js
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+// [JS][6kyu] Function Composition
+// function-composition
+// https://www.codewars.com/kata/5421c6a2dda52688f6000af8/train/javascript
+
+// prettier-ignore
+const compose = (f, g) => (...args) => f(g(...args))
+
+function compose2(f, g) {
+  return function () {
+    return f(g(...arguments))
+  }
+}
+
+const add = function (a) {
+  return a + 1
+}
+const id = function (a) {
+  return a
+}
+
+compose(add, id)(0)
+
+const add1 = function (a) {
+  return a + 1
+}
+const addAll3 = function (a, b, c) {
+  return a + b + c
+}
+
+compose(add1, addAll3)(1, 2, 3)