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                            :-: **繪制一個四瓣花圖形**
使用 turtle 庫的 turtle.circle() 函數、turtle.seth() 函數和 turtle.left() 函數繪制一個四瓣花圖形，從左上角花瓣開始，逆時針作畫，效果如下圖所示。
![](http://h.yiniuedu.com/46873703b4504d378da402eff67399d2)
```
import turtle as t
for i in range(4):
    t.seth(90?*?(i?+?1))
    t.circle(200,90)
    t.seth(-90?+?i?*?90)
    t.circle(200,90)
t.done()
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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