diff --git a/codewars/7kyu/how-much-coffee-do-you-need/koronya.js b/codewars/7kyu/how-much-coffee-do-you-need/koronya.js
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+++ b/codewars/7kyu/how-much-coffee-do-you-need/koronya.js
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+// [JS][7kyu] How much coffee do you need?
+// how-much-coffee-do-you-need
+// https://www.codewars.com/kata/57de78848a8b8df8f10005b1/train/javascript
+
+const LOWER_CASE_ARR = ['cw', 'cat', 'dog', 'movie']
+const UPPER_CASE_ARR = ['CW', 'CAT', 'DOG', 'MOVIE']
+
+const howMuchCoffee = (events) => {
+  const cost = events.reduce((acc, curr) => acc + (LOWER_CASE_ARR.includes(curr) ? 1 : UPPER_CASE_ARR.includes(curr) ? 2 : 0), 0)
+  return cost > 3 ? 'You need extra sleep' : cost
+}
+
+howMuchCoffee([]) === 0
+howMuchCoffee(['cw']) === 1
+howMuchCoffee(['CW']) === 2
+howMuchCoffee(['cw', 'CAT']) === 3
+howMuchCoffee(['cw', 'CAT', 'DOG']) === 'You need extra sleep'
+howMuchCoffee(['cw', 'CAT', 'cw=others']) === 3