def init_color_symbols(self):
        """
            'home', 'popover', 'get', 'scroll', 'paginate',
            'sleep', 'git', 'browser', 'bug',
            'end', 'right', 'wrong', 'save', 'main', 'raw'

        - font support: https://github.com/ryanoasis/nerd-fonts
        """
        # symbols = OrderedDict({})
        if self.is_prod:
            return
        keys = [
            'home', 'popover', 'get', 'scroll', 'paginate',
            'sleep', 'git', 'browser', 'bug', 'end',
            'right', 'wrong', 'save', 'main', 'raw',
            'keyboard', 'store', 'upload', 'send', 'music',
        ]

        _symbols = ['' for _ in keys]
        # symbols only available in my computer
        txt = self.cfg.get('pretty.symbols', '')
        if txt:
            sym = txt.split('\n')[0].split(',')
            _symbols = sym + _symbols[len(sym):]

        for i, k in enumerate(keys):
            if k in ['wrong', 'end']:
                self.symbols[k] = R.format(_symbols[i])
            else:
                self.symbols[k] = G.format(_symbols[i])
'home', 'popover', 'get', 'scroll', 'paginate',
            'sleep', 'git', 'browser', 'bug',
            'end', 'right', 'wrong', 'save', 'main', 'raw'

        - font support: https://github.com/ryanoasis/nerd-fonts