很长时间没有动笔了，最近学的东西很杂很乱！又有点丢了西瓜捡芝麻，走马观花，瞻前顾后的感觉！
因此，我决定一步步来，化繁为简，今天就从border入手。
很多时候我们都会需要一个三角形或者三角小箭头。我们可以用border来做。当然还有其他很多中方法，比如直接图片，canvas等。
直接上代码吧！
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<head><meta charset="UTF-8"><title>Document</title><style>*{padding:0;margin:0;}body{padding:100px;}.a0,.a1{display:inline-block;width:0;height:0;border-width:20px;border-style:solid;border-color:red blue black wheat;}.a0{width:40px;height:40px;}p{text-align:center;margin:20px;}.a2,.a2-2{display:inline-block;width:0;height:0;border-width:0 50px 50px 0;border-style:dashed solid solid dashed;border-color:red blue transparent wheat;}.a2-2{margin-left:100px;border-width:50px 50px 0px 50px;border-style:dashed solid solid dashed;border-color:red blue transparent wheat;}.a3,.a3-1{display:inline-block;width:0;height:0;border-width:50px;border-style:dashed dashed solid;border-color:transparent transparent rgb(252,146,176) !important; /*rgba(252,146,176,.2)*/-webkit-transform:rotate(-45deg);transform:rotate(-45deg);}.a3-1{display:inline-block;width:0;height:0;margin-left:100px;border-width:50px;border-style:dashed dashed solid;border-color:rgba(252,146,176,.2) rgba(252,146,176,.2) rgb(252,146,176) !important; /*rgba(252,146,176,.2)*/-webkit-transform:rotate(-45deg);transform:rotate(-45deg);}.a3 i,.a3-1 i{display:inline-block;-webkit-transform:rotate(45deg);transform:rotate(45deg);font-style:normal;margin-top:18px;margin-left:-5px;font-size:28px;color:white;}</style>
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<body><span class="a0"></span><span class="a1"></span><p><span class="a2"></span><span class="a2-2"></span></p><p style="padding:20px;"><span class="a3"><i>X</i></span><span class="a3-1"><i>X</i></span></p>
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:来用shape绘出想要的图形吧!)
