diff --git a/CodeWars/javascript/7_kyu/merge_two_arrays.js b/CodeWars/javascript/7_kyu/merge_two_arrays.js
new file mode 100644
index 0000000..4e9b496
--- /dev/null
+++ b/CodeWars/javascript/7_kyu/merge_two_arrays.js
@@ -0,0 +1,30 @@
+// https://www.codewars.com/kata/583af10620dda4da270000c5/train/javascript
+
+function mergeArrays(a, b) {
+  const output = [];
+  let cog = true;
+  let a_index = 0,
+    b_index = 0;
+  while (a_index < a.length || b_index < b.length) {
+    if (a_index >= a.length) {
+      for (let i = b_index; i < b.length; i++) {
+        output.push(b[i]);
+      }
+      break;
+    } else if (b_index >= b.length) {
+      for (let i = a_index; i < a.length; i++) {
+        output.push(a[i]);
+      }
+      break;
+    }
+    output.push(cog ? a[a_index++] : b[b_index++]);
+    cog = !cog;
+  }
+  return output;
+}
+
+function test() {
+  console.log(mergeArrays([1, 2, 3], ["a", "b", "c", "d", "e", "f"]));
+}
+
+test();