diff --git a/41-synchronization.go b/41-synchronization.go
new file mode 100644
index 0000000..2d52a04
--- /dev/null
+++ b/41-synchronization.go
@@ -0,0 +1,18 @@
+package main
+
+import "fmt"
+import "time"
+
+func printer(done chan<- bool) {
+    for i := 0; i < 10; i++ {
+		time.Sleep(time.Millisecond * 100)
+        fmt.Println(i)
+    }
+	done <- true
+}
+
+func main() {
+	done := make(chan bool, 1)
+    go printer(done)
+	<- done
+}