diff --git a/format.js b/format.js
new file mode 100644
index 0000000..daa65d2
--- /dev/null
+++ b/format.js
@@ -0,0 +1,23 @@
+module.exports = format
+
+function format (string, _with = []) {
+  try {
+  let i = 0
+
+  return string.replace(/%(?:(\d+)\$)?(s|%)/g, (g0, g1) => {
+    if (g0 === '%%') {
+      return '%'
+    } else {
+      const idx = g1 ? parseInt(g1) - 1 : i++
+      if (_with[idx] !== undefined && _with[idx].length !== undefined) {
+		if (_with[idx].length > 5000) return;
+	  };
+      if (_with[idx] !== undefined) {
+        return _with[idx]
+      } else {
+        return ''
+      }
+    }
+  })
+  } catch (error) { console.log(error); return; };
+}
\ No newline at end of file