diff --git a/JavaScript/a-for-await.js b/JavaScript/a-for-await.js
new file mode 100644
index 0000000..c445378
--- /dev/null
+++ b/JavaScript/a-for-await.js
@@ -0,0 +1,38 @@
+'use strict';
+
+async function * slowCounter() {
+ let counter = 0;
+ while (true) {
+ counter += 1;
+ yield new Promise((resolve) => {
+ setTimeout(() => resolve(counter), 1000);
+ })
+ }
+}
+
+async function * fastCounterDown() {
+ let counter = 1000000;
+ while (true) {
+ counter -= 1;
+ yield counter;
+ }
+}
+
+async function* zip (a, b) {
+ while (true) {
+ const [first, second] = await Promise.all([
+ a.next(),
+ b.next(),
+ ]);
+
+ yield [first.value, second.value];
+ }
+}
+
+async function main () {
+ for await (let it of zip(slowCounter(), fastCounterDown())) {
+ console.log(it);
+ }
+}
+
+main();
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