diff --git a/cat.js b/cat.js
new file mode 100644
index 0000000..7bfb7b6
--- /dev/null
+++ b/cat.js
@@ -0,0 +1,5 @@
+export class Cat {
+  makeAsound() {
+    console.log("wouf wouf");
+  }
+}
diff --git a/dog.js b/dog.js
new file mode 100644
index 0000000..a6c357e
--- /dev/null
+++ b/dog.js
@@ -0,0 +1,5 @@
+export class Dot {
+  makeAsound() {
+    console.log("groin groin");
+  }
+}