code: func NewDefaultSpinner(message string) Spinner {
  	chars := []string{"⣾", "⣽", "⣻", "⢿", "⡿", "⣟", "⣯", "⣷"}
  	delay := 100 * time.Millisecond
  	writer := os.Stdout
  	return NewSpinner(message, chars, delay, writer)
  }
docs: // NewDefaultSpinner ...