```python
import turtle
创建画布和画笔
window = turtle.Screen()
pen = turtle.Turtle()
设置画笔颜色和线条宽度
pen.color("red")
pen.width(5)
绘制五环图案
pen.penup()
pen.goto(-100, 0)
pen.pendown()
pen.circle(50)
pen.penup()
pen.goto(0, 0)
pen.pendown()
pen.circle(50)
pen.penup()
pen.goto(100, 0)
pen.pendown()
pen.circle(50)
pen.penup()
pen.goto(-50, -50)
pen.pendown()
pen.circle(50)
pen.penup()
pen.goto(50, -50)
pen.pendown()
pen.circle(50)
关闭画布
window.exitonclick()
```
这段代码首先导入了turtle库，然后创建了一个turtle对象。接着设置了画笔的颜色和线条宽度，并绘制了五个相交的圆，形成了五环图案。最后，通过`window.exitonclick（）`关闭了画布。