7918 - [C]实例058：画矩形

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题目：画图，学用rectangle画方形。
程序分析：无。

1. if __name__ == '__main__':
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2.     from tkinter import *
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3.     root = Tk()
   
4.     root.title('Canvas')
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5.     canvas = Canvas(root,width = 400,height = 400,bg = 'yellow')
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6.     x0 = 263
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7.     y0 = 263
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8.     y1 = 275
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9.     x1 = 275
   
10.     for i in range(19):
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11.         canvas.create_rectangle(x0,y0,x1,y1)
    
12.         x0 -= 5
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13.         y0 -= 5
    
14.         x1 += 5
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15.         y1 += 5
    
16.         
    
17.     canvas.pack()
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18.     root.mainloop()

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