def __init__(self, **kwargs):
super(LoginScreen, self).__init__(**kwargs)
layout = GridLayout()
layout.cols = 2
layout.spacing = 50
layout.row_default_height = window_height
layout.col_default_width = window_width / 10
layout.add_widget(Label(text='Observer'))
layout.observer_field = TextInput(multiline=False)
layout.add_widget(layout.observer_field)
layout.add_widget(Label(text='Box open'))
layout.box_open_field = TextInput(box_open_field=True, multiline=False)
layout.add_widget(layout.box_open_field)
self.layout = layout
self.add_widget(layout)
