怎么让图表有不同的颜色？

怎么改变颜色？

import turtle

sell_volume = [50, 89, 97, 240, 300, 260, 220]

def draw_bar_chart(turtle, height):
    turtle.left(90)
    turtle.forward(height)
    turtle.right(90)
    turtle.forward(30)
    turtle.right(90)
    turtle.forward(height)
    turtle.left(90)

# Set up the screen (window)
turtle.setup(width=600, height=800)

# Create an instance of the function
# Create Alex
Alex = turtle.Turtle()


for volume in sell_volume:
    draw_bar_chart(Alex, volume)
    Alex.penup()
    Alex.forward(50)
    Alex.pendown()

turtle.done()

望采纳，谢谢！
你可以在画每列图表时设置画笔颜色，例如：

turtle.pencolor('red')