diff --git a/src/first.ts b/src/first.ts
new file mode 100644
index 0000000..09bd9f2
--- /dev/null
+++ b/src/first.ts
@@ -0,0 +1,13 @@
+import main from './main'
+
+export interface Options {
+  name?: string
+  age?: number
+}
+
+export const first = (options: Options): void => {
+  main(options)
+  console.log('first:', options.name, options.age)
+}
+
+export default first
diff --git a/src/index.ts b/src/index.ts
index 53ae2e0..a5572ce 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,7 @@
 import main from './main'
+import first from './first'
+import second from './second'
+import third from './third'
 
 import type { Options } from './main'
 
@@ -7,7 +10,10 @@ export type {
 }
 
 export {
-  main
+  main,
+  first,
+  second,
+  third
 }
 
 export default main
diff --git a/src/second.ts b/src/second.ts
new file mode 100644
index 0000000..d230b7e
--- /dev/null
+++ b/src/second.ts
@@ -0,0 +1,15 @@
+import main from './main'
+import first from './first'
+
+export interface Options {
+  name?: string
+  age?: number
+}
+
+export const second = (options: Options): void => {
+  main(options)
+  first(options)
+  console.log('second:', options.name, options.age)
+}
+
+export default second
diff --git a/src/third.ts b/src/third.ts
new file mode 100644
index 0000000..21319c4
--- /dev/null
+++ b/src/third.ts
@@ -0,0 +1,13 @@
+import main from './main'
+
+export interface Options {
+  name?: string
+  age?: number
+}
+
+export const third = (options: Options): void => {
+  main(options)
+  console.log('third:', options.name, options.age)
+}
+
+export default third