a.py

import pyglet


class AWindow(pyglet.window.Window):
    def __init__(self):
        super(AWindow, self).__init__(100, 100)

        self.batch = pyglet.graphics.Batch()

        self.circle = pyglet.shapes.Circle(
            50, 50, 6, color=(255, 255, 255), batch=self.batch
        )

        pyglet.clock.schedule_interval(self.update, 1 / 60)

    def update(self, dt):
        self.clear()
        self.batch.draw()


if __name__ == "__main__":
    window = AWindow()
    pyglet.app.run()