def METHOD_NAME(self):
    """
    Create an instance of `TopGainers` class.\n
    ```python
    topgainers = TopGainers()
    topgainers.change()
    ```
    Return\n
    ```js
    {
        "Cipla": {"Change": "43.90", "Gain": "3.77"},
        "IndusInd Bank": {"Change": "45.10", "Gain": "3.31"},
        "Tech Mahindra": {"Change": "32.40", "Gain": "2.84"},
        "Wipro": {"Change": "9.20", "Gain": "2.30"},
        "Bharti Airtel": {"Change": "17.95", "Gain": "2.06"},
        "Axis Bank": {"Change": "16.70", "Gain": "1.79"}
    }
    ```
    """
    try:
        z = self.page_soup.find_all("td", {"width": "45"})
        z = [y.get_text() for y in z]
        values = []
        for y in range(0, len(z), 2):
            change_dict = {}
            change_dict["Change"] = z[y]
            change_dict["Gain"] = z[y + 1]
            values.append(change_dict)
        return dict(zip(self.keys, values))
    except:
        return None