如何从网站上提取图像链接并使用wget下载它们？

I really want to download images from a website, but I don't know a lot of wget to do so. They host the images on a seperate website, how I do pull the image link from the website using cat or something, so I could use wget to download them all. All I know is the wget part. Example would be Reddit.comI really want to download images from a website