diff --git a/server/handlers.go b/server/handlers.go
index 4b4c746..84da811 100644
--- a/server/handlers.go
+++ b/server/handlers.go
@@ -809,6 +809,29 @@ func (c *RoomClient) handleSev(msg []string) error {
 	return nil
 }
 
+const (
+	animStart = iota
+	animStop
+)
+
+func (c *RoomClient) handleAnc(msg []string) error {
+	if len(msg) != 2 {
+		return errors.New("segment count mismatch")
+	}
+
+	cmd, err := strconv.Atoi(msg[1])
+	if err != nil {
+		return err
+	}
+	if cmd > animStop || cmd < animStart {
+		return errors.New("invalid command")
+	}
+
+	c.broadcast(buildMsg("anc", cmd))
+
+	return nil
+}
+
 // SESSION
 
 func (c *SessionClient) handleI() error {
diff --git a/server/room.go b/server/room.go
index 677bccb..8f40bc5 100644
--- a/server/room.go
+++ b/server/room.go
@@ -295,6 +295,8 @@ func (c *RoomClient) processMsg(msgStr string) (err error) {
 		err = c.handleSv(msgFields)
 	case "sev":
 		err = c.handleSev(msgFields)
+	case "anc":
+		err = c.handleAnc(msgFields)
 	default:
 		err = errors.New("unknown message type")
 	}