import turtle

# 定义变量

t = turtle.Turtle()

t.hideturtle()

greet = "欢迎来到阿波罗源码世界"

font=("Script MT Bold", 20, "bold")

colors = ["red", "orange","yellow"]

for a in range(10):

    t.color(colors[a%3])

    t.write(greet,align="center",font=font)

    t.left(90)

# 输出

print('hello, 阿波罗')