Change default OFF fade to 20s

serve.go

@@ -156,7 +156,7 @@ func (s *Server) createEffect(cmd, parms string, w *bufio.Writer) (effects.Effec
  return s.laste, nil
  case cmd == "OFF":
  // Hack: we insert this directly into the channel because we don't want to overwrite whatever the last effect was
- fb := effects.NewFade(10*time.Second, pixarray.Pixel{0, 0, 0, 0})
+ fb := effects.NewFade(20*time.Second, pixarray.Pixel{0, 0, 0, 0})
  s.off = true
  s.c <- fb
  return nil, nil