可以使用Python的turtle模塊來畫一個簡單的雪人。下面是一個示例代碼：

```python

import turtle

# 畫頭部

turtle.fillcolor("white")

turtle.begin_fill()

turtle.circle(60)

turtle.end_fill()

# 畫身體

turtle.penup()

turtle.goto(0, -80)

turtle.pendown()

turtle.fillcolor("white")

turtle.begin_fill()

turtle.circle(80)

turtle.end_fill()

# 畫眼睛

turtle.penup()

turtle.goto(-20, 50)

turtle.pendown()

turtle.fillcolor("black")

turtle.begin_fill()

turtle.circle(10)

turtle.end_fill()

turtle.penup()

turtle.goto(20, 50)

turtle.pendown()

turtle.begin_fill()

turtle.circle(10)

turtle.end_fill()

# 畫嘴巴

turtle.penup()

turtle.goto(-25, 20)

turtle.pendown()

turtle.pencolor("red")

turtle.pensize(3)

turtle.right(90)

turtle.circle(25, 180)

# 畫身體上的按鈕

turtle.penup()

turtle.goto(0, -20)

turtle.pendown()

turtle.fillcolor("black")

turtle.begin_fill()

turtle.circle(8)

turtle.end_fill()

turtle.penup()

turtle.goto(0, -50)

turtle.pendown()

turtle.fillcolor("black")

turtle.begin_fill()

turtle.circle(8)

turtle.end_fill()

turtle.penup()

turtle.goto(0, -80)

turtle.pendown()

turtle.fillcolor("black")

turtle.begin_fill()

turtle.circle(8)

turtle.end_fill()

turtle.done()

```

在Python環境中運行此代碼，即可看到一個簡單的雪人圖案。您可以根據需要進行修改和優化。