需使用Python Turtle绘制如下螺旋图形，补全代码中range函数的参数：

import turtle
turtle.pensize(2)
for i in range(__________):
    if i % 2 == 0:
        turtle.color("red")
    else:
        turtle.color("green")
    turtle.forward(i * 5)
    turtle.right(90)