diff --git a/index.js b/index.js
index f67b2c6..adcd0ce 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,18 @@
-console.log("Hello via Bun!");
\ No newline at end of file
+
+import { cc } from "bun:ffi";
+import source from "./test.c" with { type: "file" };
+
+const {
+  symbols: { fibonacci },
+} = cc({
+  source,
+  symbols: {
+    hello: {
+      args: [],
+      returns: "int",
+    },
+  },
+});
+
+console.log("fibonacci serie 1 000 000: ", fibonacci() );
+