Transition between two values.

    :param value: Current iteration.
    :param maximum: Maximum number of iterations.
    :param start: Start value.
    :param end: End value.
    :returns: Transitional value.

def transition(value, maximum, start, end):
    """ Transition between two values.

    :param value: Current iteration.
    :param maximum: Maximum number of iterations.
    :param start: Start value.
    :param end: End value.
    :returns: Transitional value.
    """
    return round(start + (end - start) * value / maximum, 2)