diff --git a/js/main.js b/js/main.js
new file mode 100644
index 0000000..c7fd0d4
--- /dev/null
+++ b/js/main.js
@@ -0,0 +1,17 @@
+let inOut = {
+  input: 'Hi',
+  output: 'Hello ! '
+};
+
+function replay() {
+  let question = document.getElementById("input").value;
+  let txtArea = document.getElementById("output");
+
+  if (question === inOut.input) {
+    txtArea.innerHTML=inOut.output;
+  } else {
+    txtArea.innerHTML=" I do not understand that command";
+
+  }
+}
+document.getElementById("submit").addEventListener('click',replay);
\ No newline at end of file