def left_strip(elements, element_to_strip):
    """Remove preceeding center color occurences.

    Slice the list from the first non center color occurance to the
    end of the list.

    Args:
        elements (List[str]): The unstriped list of elements.
        element_to_strip (str): The element to strip from the list.

    Returns:
        List[str]: The list left striped of the element.

    Example:
        >>> left_strip(['1', '2', '2', '3'], '1')
        ['2', '2', '3']
        >>> left_strip(['1', '2', '2', '3'], '2')
        ['1', 2', '2', '3']
    """
    if elements and elements[0] == element_to_strip:
        for elem in elements:
            if elem != element_to_strip:
                return elements[elements.index(elem):]

    return elements