如何为 svg 制作动画？

.pict path {
  stroke-width: 2;
  animation: dash 2s linear  infinite;
}

@keyframes dash {
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    stroke: red;
    stroke-dasharray: 0 1000;
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  to {
    fill: green;
    stroke: black;
    stroke-dasharray: 1000 1000;
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