def normalize_phase_0d5(phase):
    """Normalize phase between -0.5 and 0.5

    Examples
    --------
    >>> normalize_phase_0d5(0.5)
    0.5
    >>> normalize_phase_0d5(-0.5)
    0.5
    >>> normalize_phase_0d5(4.25)
    0.25
    >>> normalize_phase_0d5(-3.25)
    -0.25
    """
    while phase > 0.5:
        phase -= 1
    while phase <= -0.5:
        phase += 1
    return phase