diff --git a/book_with_bridge/comon_shit/main.go b/book_with_bridge/comon_shit/main.go
index 3b96bc3..5f587a5 100644
--- a/book_with_bridge/comon_shit/main.go
+++ b/book_with_bridge/comon_shit/main.go
@@ -2,16 +2,15 @@ package main
 
 import "fmt"
 
-func join(srt ...string) string {
-	res := ""
-	for _,s := range srt {
-		fmt.Println(s)
-		res = res + s + " "
+func square() func () int {
+	var x int
+	return func() int {
+		x++
+		return x*x
 	}
-	return res
 }
-
 func main() {
-	// s := []string{"lol","kik"}
-	fmt.Println(join("lol","kek"))
+	f := square()
+	fmt.Println(f())	
+	fmt.Println(f())	
 }
\ No newline at end of file
diff --git a/book_with_bridge/defer/main.go b/book_with_bridge/defer/main.go
new file mode 100644
index 0000000..62f271d
--- /dev/null
+++ b/book_with_bridge/defer/main.go
@@ -0,0 +1 @@
+package defer