diff --git a/gotime/src/goroutines-01.go b/gotime/src/goroutines-01.go
new file mode 100644
index 0000000..84bf43c
--- /dev/null
+++ b/gotime/src/goroutines-01.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+    "fmt"
+    "time"
+)
+
+func say(s string) {
+    for i := 0; i < 5; i++ {
+        time.Sleep(100 * time.Millisecond)
+        fmt.Println(s)
+    }
+}
+
+func main() {
+    go say("world")
+    say("hello")
+}