用代码制作一个的圆，在圆心处有1个90°的扇形框，标识为G1，颜色为黑色。在圆上有1个随机的黑点，此系统拥有翻转按钮，按下此按钮，就将G1移动到黑点处，并将G1变成红色.

以下是Python代码实现：

import turtle
import random

# 创建画布和画笔
canvas = turtle.Screen()
pen = turtle.Turtle()

# 绘制圆和扇形框
pen.penup()
pen.goto(0, -100)
pen.pendown()
pen.circle(100)
pen.penup()
pen.goto(0, 0)
pen.pendown()
pen.fillcolor("black")
pen.begin_fill()
pen.circle(100, 90)
pen.goto(0, 0)
pen.end_fill()

# 随机生成黑点的位置
x = random.randint(-80, 80)
y = random.randint(0, 80)

# 绘制黑点
pen.penup()
pen.goto(x, y)
pen.pendown()
pen.dot(10, "black")

# 翻转函数
def flip():
    pen.fillcolor("red")
    pen.penup()
    pen.goto(x, y)
    pen.pendown()
    pen.begin_fill()
    pen.circle(100, 90)
    pen.goto(x, y)
    pen.end_fill()

# 绑定键盘事件
canvas.onkeypress(flip, "space")
canvas.listen()

canvas.mainloop()