HTML5-SVG超人飞翔动画特效

代码片段：

<linearGradient id="SVGID_1_" gradientUnits="userSpaceOnUse" x1="1003.7168" y1="97.4979" x2="1003.7168" y2="965.6392" gradientTransform="matrix(-4.489700e-11 -1 -1 4.489700e-11 1211.5673 1211.5673)">
<stop offset="0" style="stop-color:#00AEEF" />
<stop offset="1" style="stop-color:#000000;stop-opacity:0" />
</linearGradient>
<polygon fill="url(#SVGID_1_)" points="1571.4,183.7 1839.3,183.7 1839.3,232 1832.2,232 1832.2,226.9 -540,226.9 -540,197.5