diff --git a/book_with_bridge/channels/go.mod b/book_with_bridge/channels/go.mod
new file mode 100644
index 0000000..1da823a
--- /dev/null
+++ b/book_with_bridge/channels/go.mod
@@ -0,0 +1,3 @@
+module main
+
+go 1.24.5
diff --git a/book_with_bridge/channels/launch!/go.mod b/book_with_bridge/channels/launch!/go.mod
new file mode 100644
index 0000000..1da823a
--- /dev/null
+++ b/book_with_bridge/channels/launch!/go.mod
@@ -0,0 +1,3 @@
+module main
+
+go 1.24.5
diff --git a/book_with_bridge/channels/launch!/main.go b/book_with_bridge/channels/launch!/main.go
new file mode 100644
index 0000000..f99bed6
--- /dev/null
+++ b/book_with_bridge/channels/launch!/main.go
@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"time"
+)
+
+
+func launch() {
+	fmt.Println("To abort launch press Enter")
+	for i:=10;i >=0; i-- {
+		fmt.Printf("%d...\n",i)
+	}
+}
+
+func main() {
+	abort := make(chan struct{})
+
+	go func() {
+		os.Stdin.Read(make([]byte,1))
+		abort <- struct{}{}
+	}()
+
+	tick := time.Tick(1*time.Second)
+
+	for i:=10; i>=0; i-- {
+		fmt.Printf("%d...\n",i)
+		select {
+			case <-tick:
+			case <- abort:
+				fmt.Println("Launch cancelled")
+				return
+		}
+	}
+}
\ No newline at end of file
diff --git a/book_with_bridge/channels/main.go b/book_with_bridge/channels/main.go
new file mode 100644
index 0000000..7863b4b
--- /dev/null
+++ b/book_with_bridge/channels/main.go
@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+func kek(i int) {
+	res_string := ""
+	for range i {
+		res_string += " "
+	}
+	fmt.Println(res_string,i)
+}
+
+func main() {
+	done := make(chan int)
+	
+	for i:=range 10 {
+		go func() {
+			kek(i)
+			done <- 1
+		}()
+	}
+	for range 10 {
+		<- done
+	}
+
+}
\ No newline at end of file
diff --git a/book_with_bridge/interfaces/reverb_client/main.go b/book_with_bridge/interfaces/reverb_client/main.go
index c304ba4..9d0904e 100644
--- a/book_with_bridge/interfaces/reverb_client/main.go
+++ b/book_with_bridge/interfaces/reverb_client/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"io"
 	"log"
 	"net"
@@ -9,7 +10,7 @@ import (
 
 func mustCopy(dst io.Writer,src io.Reader) {
 	if _,err := io.Copy(dst,src); err != nil {
-		log.Fatalf("Error in mustCopy",err)
+		log.Fatalf("Error in mustCopy %s",err)
 	}
 
 }
@@ -20,7 +21,14 @@ func main() {
 		log.Fatalf("Error in Dial %s",err)
 	}
 	defer conn.Close()
+	done := make(chan struct{})
 	
-	go mustCopy(os.Stdout,conn)
-	mustCopy(conn,os.Stdin)
+	go func() {
+		io.Copy(os.Stdin,conn)
+		fmt.Println("done")
+		done <- struct{}{}
+	}()
+	io.Copy(conn,os.Stdout)
+	conn.Close()
+	<-done
 }
\ No newline at end of file
diff --git a/book_with_bridge/interfaces/reverb_server/main.go b/book_with_bridge/interfaces/reverb_server/main.go
index e00889b..9cc4a4e 100644
--- a/book_with_bridge/interfaces/reverb_server/main.go
+++ b/book_with_bridge/interfaces/reverb_server/main.go
@@ -10,23 +10,46 @@ import (
 )
 
 func echo(c net.Conn, shout string, t time.Duration) {
-	fmt.Fprintln(c, "\t", strings.ToUpper(shout))
-	time.Sleep(t)
-	fmt.Fprintln(c, "\t", shout)
-	time.Sleep(t)
-	fmt.Fprintln(c, "\t", strings.ToLower(shout))
+	for _ = range 3 {
+		fmt.Fprintln(c, "\t", strings.ToUpper(shout))
+		time.Sleep(t)
+	}
 }
 
 func handleConn(conn net.Conn) {
+
+	count := 1
 	defer fmt.Println("CLosed Connection")
 	defer conn.Close()
 
 	fmt.Println("Accepted connection")
+
+	ticker := time.NewTicker(2*time.Second)
+
 	input := bufio.NewScanner(conn)
-	for input.Scan() {
-		go echo(conn, input.Text(), 1*time.Second)
+	select {
+	case <- ticker.C:
+		fmt.Println("TIMEOUT")
+	default:
+		fmt.Println("DEFAULT")
 	}
 
+	for input.Scan() {
+		fmt.Println("TICK")
+		switch input.Text() {
+		case "info":
+			fmt.Printf("INFO %d",count)
+		default:
+			count++
+			go func() {
+				defer func (){
+					count--
+				}()
+				echo(conn, input.Text(), 1*time.Second)
+			}()
+
+		}
+	}
 }
 
 func main() {