再来更新一波以前的代码：
都不记得以前我写过这些了哈哈哈，记录一下。
效果是这样的
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>Document</title><style>.leaf{width: 100px;height: 100px;border:1px solid green;margin:250px;border-radius: 0 100px;background-image: linear-gradient(135deg,green,yellow)}</style></head><body><div class="leaf"></div><!-- <div class="leaf"></div> --></body></html>
