diff --git a/main.go b/main.go
index 6d2d376..1aecfef 100644
--- a/main.go
+++ b/main.go
@@ -44,7 +44,7 @@ func main() {
 func clock(s *Slot) {
 	for !s.IsFinished() {
 		s.Switch()
-		drawSlot(s)
+		DrawSlot(s)
 		time.Sleep(time.Duration(s.IntervalTime()) * time.Millisecond)
 	}
 }
diff --git a/view.go b/view.go
index cfaf4ca..2f11983 100644
--- a/view.go
+++ b/view.go
@@ -6,7 +6,7 @@ import (
 	termbox "github.com/nsf/termbox-go"
 )
 
-func drawSlot(s *Slot) {
+func DrawSlot(s *Slot) {
 	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
 
 	idx := s.CurrentSlotIndex()