import flet as ft


def main(page: ft.Page):
    counter = ft.Text("0", size=50, data=0)

    def increment_click(e):
        counter.data += 1
        counter.value = str(counter.data)
        counter.update()

    page.floating_action_button = ft.ElevatedButton(
        content=ft.Text('Add'),
        # bgcolor=ft.Colors.RED, # UNCOMMENT
        style=ft.ButtonStyle(
            shape=ft.RoundedRectangleBorder(
                radius=4,
            ),
        ),
        on_click=increment_click,
    )
    page.add(
        ft.SafeArea(
            expand=True,
            content=ft.Container(
                content=counter,
                alignment=ft.Alignment.CENTER,
            ),
        )
    )

ft.run(main)