<ColoredLabel@Label>:
    font_size: '48sp'
    color: (.6, .6, .6, 1)
    canvas.before:
        Color:
            rgb: (.9, .9, .9)
        Rectangle:
            pos: self.x + sp(2), self.y + sp(2)
            size: self.width - sp(4), self.height - sp(4)

ShowcaseScreen:
    name: 'Carousel'
    fullscreen: True

    BoxLayout:
        size_hint_y: None
        height: '48dp'

        ToggleButton:
            text: 'Loop'
            id: btnloop

        Label:
            size_hint_x: None
            width: self.height
            text: '{}'.format(carousel.index)

        Button:
            size_hint_x: None
            width: self.height
            text: 'Prev'
            on_release: carousel.load_previous()

        Button:
            size_hint_x: None
            width: self.height
            text: 'Next'
            on_release: carousel.load_next()

    Carousel:
        id: carousel
        loop: btnloop.state == 'down'

        ColoredLabel:
            text: 'Slide 0'

        ColoredLabel:
            text: 'Slide 1'

        ColoredLabel:
            text: 'Slide 2'