代码填空: 要想绘制出如下图所示的带颜色的多个矩形效果,请你在下列代码的空白位置补充完整。 程序代码参考如下: from tkinter import * import random tk=Tk() canvas=Canvas(tk,width=400,height=400) canvas.pack() def random_rectangle(width,height,fill_color): x1=random.randrange ( ) y1=random.randrange ( ) x2=random.randrange ( ) y2=random.randrange ( ) canvas.create_rectangle(x1,y1,x2,y2,fill=fill_color) for x in range(0,100): random_rectangle(400,400,'orange')