How to use the arcade.start_render function in arcade

def on_draw(delta_time):
    """
    Use this function to draw everything to the screen.
    """

    # Start the render. This must happen before any drawing
    # commands. We do NOT need a stop render command.
    arcade.start_render()

    # Draw a rectangle.
    # For a full list of colors see:
    # http://arcade.academy/arcade.color.html
    arcade.draw_rectangle_filled(on_draw.center_x, on_draw.center_y,
                                 RECT_WIDTH, RECT_HEIGHT,
                                 arcade.color.ALIZARIN_CRIMSON)

    # Modify rectangles position based on the delta
    # vector. (Delta means change. You can also think
    # of this as our speed and direction.)
    on_draw.center_x += on_draw.delta_x * delta_time
    on_draw.center_y += on_draw.delta_y * delta_time

    # Figure out if we hit the edge and need to reverse.
    if on_draw.center_x < RECT_WIDTH // 2 \

def on_draw(self):
        """
        Render the screen.
        """

        # Start the render process. This must be done before any drawing commands.
        arcade.start_render()

        radius = 50
        width = radius * 2
        x = 200
        y = 100
        arcade.draw_rectangle_outline(x, y, width, width, arcade.color.BLACK, 2)
        arcade.draw_circle_outline(x, y, radius, arcade.color.BLACK, 2)
        arcade.draw_line(x - radius, y, x + radius, y, arcade.color.BLACK, 2)

        x = 200
        y = 300
        width = 150
        half_width = width / 2
        arcade.draw_rectangle_outline(x, y, width, 50, arcade.color.BLACK, 2)
        arcade.draw_ellipse_outline(x, y, width, 50, arcade.color.AFRICAN_VIOLET, 2)
        arcade.draw_line(x - half_width, y, x + half_width, y, arcade.color.RED, 2)

def main():
    arcade.open_window(SCREEN_WIDTH, SCREEN_HEIGHT, "Drawing with Functions")
    arcade.set_background_color(arcade.color.DARK_BLUE)
    arcade.start_render()

    # Draw the ground
    arcade.draw_lrtb_rectangle_filled(0, SCREEN_WIDTH, SCREEN_HEIGHT / 3, 0, arcade.color.AIR_SUPERIORITY_BLUE)

    # Draw a snow person

    # Snow
    arcade.draw_circle_filled(300, 200, 60, arcade.color.WHITE)
    arcade.draw_circle_filled(300, 280, 50, arcade.color.WHITE)
    arcade.draw_circle_filled(300, 340, 40, arcade.color.WHITE)

    # Eyes
    arcade.draw_circle_filled(285, 350, 5, arcade.color.BLACK)
    arcade.draw_circle_filled(315, 350, 5, arcade.color.BLACK)

    # Finish and run

def on_draw(self):
        """
        Render the screen.
        """

        # This command should happen before we start drawing. It will clear
        # the screen to the background color, and erase what we drew last frame.
        arcade.start_render()

        # start_x and start_y make the start point for the text. We draw a dot to make it easy too see
        # the text in relation to its start x and y.
        start_x = 50
        start_y = 450
        arcade.draw_point(start_x, start_y, arcade.color.BLUE, 5)

        arcade.draw_text("Simple line of text in 12 point", start_x, start_y, arcade.color.BLACK, 12, )

        arcade.draw_point(start_x, start_y, arcade.color.BLUE, 5)
        start_x = 50
        start_y = 400
        arcade.draw_text("Text anchored 'top' and 'left'.",
                         start_x, start_y, arcade.color.BLACK, 12, anchor_x="left", anchor_y="top")

        start_y = 350

def on_draw(self):
        """ Called whenever we need to draw the window. """
        arcade.start_render()

        arcade.draw_circle_filled(self.ball_x, self.ball_y, 15, arcade.color.AUBURN)

def main():
    arcade.open_window(SCREEN_WIDTH, SCREEN_HEIGHT, "Drawing with Functions")
    arcade.set_background_color(arcade.color.DARK_BLUE)
    arcade.start_render()

    draw_grass()
    draw_snow_person(50, 50)

    # Finish and run
    arcade.finish_render()
    arcade.run()

def on_draw(self):
        """ Draw everything """
        arcade.start_render()
        self.coin_list.draw()
        self.player_list.draw()

        # Put the text on the screen.
        output = f"Score: {self.score}"
        arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)

def on_draw(self):
        """
        Render the screen.
        """

        # This command has to happen before we start drawing
        arcade.start_render()

        # Start timing how long this takes
        draw_start_time = timeit.default_timer()

        # --- Draw all the rectangles
        self.shape_list.draw()

        output = f"Drawing time: {self.draw_time:.3f} seconds per frame."
        arcade.draw_text(output, 20, SCREEN_HEIGHT - 40, arcade.color.WHITE, 18)

        self.draw_time = timeit.default_timer() - draw_start_time

def on_draw(self):
        """ Draw everything """
        arcade.start_render()
        self.all_sprites_list.draw()

        # Put the text on the screen.
        output = f"Score: {self.score}"
        arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)

def on_draw(self):
        """ Render the screen. """

        # Start timing how long this takes
        draw_start_time = timeit.default_timer()

        # This command should happen before we start drawing. It will clear
        # the screen to the background color, and erase what we drew last frame.
        arcade.start_render()

        # Draw the sprites
        self.wall_list.draw()
        self.player_list.draw()

        # Draw info on the screen
        sprite_count = len(self.wall_list)

        output = f"Sprite Count: {sprite_count}"
        arcade.draw_text(output,
                         self.view_left + 20,
                         self.height - 20 + self.view_bottom,
                         arcade.color.WHITE, 16)

        output = f"Drawing time: {self.draw_time:.3f}"
        arcade.draw_text(output,