def subhead(Screen, text, i, j):
    label = Label()
    label.font_size = '30sp'
    label.pos = (i, j)
    label.text = text
    Screen.add_widget(label)
def label(i, j, text):
    label = Label()
    label.font_size = '18sp'
    label.pos = (i, j)
    label.text = text
    return label