diff --git a/codewars/7kyu/how-green-is-my-valley/koronya.js b/codewars/7kyu/how-green-is-my-valley/koronya.js
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+++ b/codewars/7kyu/how-green-is-my-valley/koronya.js
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+// [JS][7kyu] How Green Is My Valley?
+// how-green-is-my-valley
+// https://www.codewars.com/kata/56e3cd1d93c3d940e50006a4/train/javascript
+
+const makeValley = (arr) => {
+  arr.sort((a, b) => b - a)
+  const leftArr = arr.filter((_, index) => index % 2 === 0)
+  const rightArr = arr.filter((_, index) => index % 2 === 1)
+  return [...leftArr, ...rightArr.reverse()]
+}
+
+// makeValley([79, 35, 54, 19, 35, 25])
+// makeValley([67, 93, 100, -16, 65, 97, 92])
+// makeValley([66, 55, 100, 68, 46, -82, 12, 72, 12, 38])
+
+// makeValley([17, 17, 15, 14, 8, 7, 7, 5, 4, 4, 1])
+// makeValley([20, 7, 6, 2])
+// makeValley([14, 10, 8])
+// makeValley([20, 18, 17, 13, 12, 12, 10, 9, 4, 2, 2, 1, 1])
+// makeValley([20, 16, 14, 10, 1])
+// makeValley([19, 19, 18, 14, 12, 11, 9, 7, 4])
+// makeValley([20, 18, 16, 15, 14, 14, 13, 13, 10, 9, 4, 4, 4, 1])
+// makeValley([20, 20, 16, 14, 12, 12, 11, 10, 3, 2])
+// makeValley([19, 17, 16, 15, 13, 8, 5, 5, 4, 4, 4])
+// makeValley([19, 8, 6])