console 命令行工具 X clear
console
<!DOYTYPE html>
<html>
    <head>
    </head>
    <body>
        <svg width="500px" height="500px" viewBox="0 0 100 100">
            
            <polygon points="10,12 50,12 30,22" 
            fill="blue" stroke="black"/>
            <polygon points="10,15 10,40 50,40 50,15 30,25" 
            fill="blue" stroke="black"/>
            <circle cx="30" cy="28" r="3" fill="pink" stroke="black"/>
        </svg>
    </body>
</html>