以前有网友上传的有图片参数为：x，y的下载脚本：tiles.yaml。现在地址变为：x，y，z了，这个脚本怎样修改，求大神指点一二。

url_template: "https://firstimagesplitimage.oss-cn-beijing.aliyuncs.com/%e7%ac%ac6%e6%89%b9%2f%e7%bb%8f%e5%85%b8%e7%8f%8d%e8%97%8f%e4%b8%ad%e5%9b%bd%e4%b9%a6%e6%b3%95%e4%bc%a0%e4%b8%96%e7%8f%8d%e5%93%813000%e5%b9%85%2f%e5%85%83+%e5%ba%b7%e9%87%8c%e5%b7%8e%e5%b7%8e+%e8%8d%89%e4%b9%a6%e5%bc%a0%e6%97%ad%e7%ac%94%e6%b3%95%e5%8d%b7+%e7%ba%b8%e6%9c%ac35.8%c3%97329.6jpg%2f15/{{x}}_{{y}}.jpg"

x_template: "x * tile_size"
y_template: "y * tile_size"

variables:
- { name: x, from: 0, to: 46} # Image width, in tiles
- { name: y, from: 0, to: 4} # Image height, in tiles
- { name: tile_size, value: 512 }

headers:
# Specifying a Referer makes the server believe we come from that URL.
Referer: "https://topimage.design/"