用代码制作一个外围带有360°刻度线的圆，在圆心处有三个90°的扇形框，分别标识为G1、G2、G3。在圆上有1个随机的黑点，此系统拥有翻转按钮，若G1可以覆盖黑点，就将其移动到黑点处

以下是Python代码实现：

import pygame
import random
import math

# initialize pygame
pygame.init()

# set window size
window_width = 600
window_height = 600
window = pygame.display.set_mode((window_width, window_height))

# set font
font = pygame.font.SysFont('Arial', 16)

# set colors
black = (0, 0, 0)
white = (255, 255, 255)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)

# set circle parameters
circle_radius = 200
circle_center = (window_width // 2, window_height // 2)
circle_thickness = 10

# set angle parameters
angle_step = 10
angle_offset = -90

# set sector parameters
sector_width = 50
sector_height = 50

# set point parameters
point_radius = 10

# initialize angle and sector positions
angle_positions = []
sector_positions = []
for angle in range(0, 360, angle_step):
    angle_positions.append(angle + angle_offset)
    sector_positions.append((angle + angle_step // 2 + angle_offset) % 360)

# initialize point position
point_position = (random.randint(0, window_width), random.randint(0, window_height))

# initialize flip state
flip_state = False

# define function to draw circle
def draw_circle():
    pygame.draw.circle(window, black, circle_center, circle_radius, circle_thickness)
    
    for angle in angle_positions:
        x1 = circle_center[0] + (circle_radius - circle_thickness // 2) * math.cos(math.radians(angle))
        y1 = circle_center[1] + (circle_radius - circle_thickness // 2) * math.sin(math.radians(angle))
        x2 = circle_center[0] + (circle_radius + circle_thickness // 2) * math.cos(math.radians(angle))
        y2 = circle_center[1] + (circle_radius + circle_thickness // 2) * math.sin(math.radians(angle))
        pygame.draw.line(window, white, (x1, y1), (x2, y2), 2)

# define function to draw sectors
def draw_sectors():
    for angle in sector_positions:
        x = circle_center[0] + (circle_radius - sector_width // 2) * math.cos(math.radians(angle))
        y = circle_center[1] + (circle_radius - sector_height // 2) * math.sin(math.radians(angle))
        sector_rect = pygame.Rect(x, y, sector_width, sector_height)
        pygame.draw.rect(window, white, sector_rect, 2)
        
        sector_text = font.render('G' + str(sector_positions.index(angle) + 1), True, white)
        sector_text_rect = sector_text.get_rect(center=(x + sector_width // 2, y + sector_height // 2))
        window.blit(sector_text, sector_text_rect)

# define function to draw point
def draw_point():
    pygame.draw.circle(window, black, point_position, point_radius)

# define function to check if point is inside sector
def check_sector(point, angle):
    x = circle_center[0] + (circle_radius - sector_width // 2) * math.cos(math.radians(angle))
    y = circle_center[1] + (circle_radius - sector_height // 2) * math.sin(math.radians(angle))
    sector_rect = pygame.Rect(x, y, sector_width, sector_height)
    return sector_rect.collidepoint(point)

# define main loop
def main_loop():
    global point_position
    global flip_state
    
    # loop until user quits
    while True:
        # event handling
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                return
                
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_SPACE:
                    flip_state = not flip_state
                    
        # clear screen
        window.fill(blue)
        
        # draw circle, sectors, and point
        draw_circle()
        draw_sectors()
        draw_point()
        
        # check if point is inside any sector
        in_sector = False
        for angle in sector_positions:
            if check_sector(point_position, angle):
                in_sector = True
                break
                
        # flip point if required
        if flip_state and in_sector:
            for angle in sector_positions:
                if check_sector(point_position, angle):
                    x = circle_center[0] + (circle_radius - sector_width // 2) * math.cos(math.radians(angle))
                    y = circle_center[1] + (circle_radius - sector_height // 2) * math.sin(math.radians(angle))
                    point_position = (int(x + sector_width // 2), int(y + sector_height // 2))
                    break
        
        # update screen
        pygame.display.update()

# start main loop
main_loop()