diff --git a/concurrency/subtasks/main.go b/concurrency/subtasks/main.go
index ab8f7d2..3c03aca 100644
--- a/concurrency/subtasks/main.go
+++ b/concurrency/subtasks/main.go
@@ -1,8 +1,55 @@
 package main
 
-import "github.com/jianhan/go-patterns/concurrency/subtasks/fetchers"
+import (
+	"errors"
+
+	"github.com/davecgh/go-spew/spew"
+)
+
+type Person struct {
+	Name string
+}
+
+type Dog struct {
+	Name string
+}
+
+type House struct {
+	person *Person
+	dog    *Dog
+}
 
 func main() {
 	// divide_and_conquer.RunDivideAndConquer()
-	fetchers.RunFetchers()
+	// fetchers.RunFetchers()
+	// h := &House{}
+	// spew.Dump(h)
+
+	// go func() {
+	// 	defer fmt.Println("Returned")
+	// 	for {
+	// 		select {
+	// 		default:
+	// 			return
+	// 		}
+	// 	}
+	// 	fmt.Println("TEST")
+	// }()
+	// time.Sleep(time.Second)
+	// spew.Dump(caller())
+	// spew.Dump(nakedReturn())
+}
+
+func nakedReturn() (i uint32, err error) {
+	return 12, errors.New("Test")
+}
+
+func caller() (d *Dog, err error) {
+	p, err := produceErr()
+	spew.Dump(p)
+	return
+}
+
+func produceErr() (*Person, error) {
+	return &Person{Name: "James"}, errors.New("New Error")
 }