diff --git a/gotime/src/exercise-fibonacci-closure.go b/gotime/src/exercise-fibonacci-closure.go
new file mode 100644
index 0000000..2ab954b
--- /dev/null
+++ b/gotime/src/exercise-fibonacci-closure.go
@@ -0,0 +1,23 @@
+package main
+
+import "fmt"
+
+// fibonacci is a function that returns
+// a function that returns an int.
+func fibonacci() func() int {
+    prev := 0
+    cur := 1
+    return func() int {
+        old_cur := cur
+        cur = prev + cur
+        prev = old_cur
+        return cur
+    }
+}
+
+func main() {
+    f := fibonacci()
+    for i := 0; i < 10; i++ {
+        fmt.Println(f())
+    }
+}