SVG Coding

<svg height="50" width="1260">
   <defs>
     <filter id="f3" x="0" y="0" width="200%" height="200%">
       <feOffset result="offOut" in="SourceAlpha" dx="20" dy="20" />
       <feGaussianBlur result="blurOut" in="offOut" stdDeviation="10" />
       <feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
     </filter>
   </defs>
   <rect width="1300" height="25" stroke="blue" stroke-width="1"
   fill="white" filter="url(#f3)" />
</svg>