def get_command(t):
    """
        return the command to be used based on the current time
    """
    if t < 43200 and t > 18000:
        command = 'morning'
    elif t > 43200 and t < 61200:
        command = 'afternoon'
    elif t > 61200 and t < 72000:
        command = 'evening'
    else:
        command = 'night'
    return command
