svgケースの詳しい説明

html, body {
  width: 100%;
  height: 100%;}body {
  background: #131518;}#patt1 path {
  stroke: #ff509e;}#patt2 path {
  stroke: #95d13c;}#patt3 path {
  stroke: #00b6cb;}#patt4 path {
  stroke: #9753e1;}#mask1 rect {
  -webkit-animation: pulse 1.90476s infinite;  animation: pulse 1.90476s infinite;
  -webkit-animation-timing-function: cubic-bezier(0.445, 0.05, 0.55, 0.95);  animation-timing-function: cubic-bezier(0.445, 0.05, 0.55, 0.95);}#mask2 rect {
  x: 10;
  -webkit-animation: pulse 1.90476s infinite 0.47619s;  animation: pulse 1.90476s infinite 0.47619s;
  -webkit-animation-timing-function: cubic-bezier(0.445, 0.05, 0.55, 0.95);  animation-timing-function: cubic-bezier(0.445, 0.05, 0.55, 0.95);}#squiggle1, #squiggle2, #squiggle3, #squiggle4 {
  background-blend-mode: multiply;}@-webkit-keyframes pulse {
  0% {x: 10;
  }
  50% {x: -20;
  }
  100% {x: -50;
  }}

@keyframes pulse {
  0% {x: 10;
  }
  50% {x: -20;
  }
  100% {x: -50;
  }}

<svg viewBox="0 0 200 200">
  <defs><pattern id="patt1" x="0" y="0" width="60" height="60" patternUnits="userSpaceOnUse">  <path d="M0,7.5C12.9,7.5 17.1,22.5 30,22.5C42.9,22.5 47.1,7.5 60,7.5" stroke="#f00" stroke-width="1" fill="transparent"></path></pattern><pattern id="patt2" x="30" y="15" width="60" height="60" patternUnits="userSpaceOnUse">  <path d="M0,7.5C12.9,7.5 17.1,22.5 30,22.5C42.9,22.5 47.1,7.5 60,7.5" stroke="#00f" stroke-width="1" fill="transparent"></path></pattern><pattern id="patt3" x="0" y="30" width="60" height="60" patternUnits="userSpaceOnUse">  <path d="M0,7.5C12.9,7.5 17.1,22.5 30,22.5C42.9,22.5 47.1,7.5 60,7.5" stroke="#0f0" stroke-width="1" fill="transparent"></path></pattern><pattern id="patt4" x="30" y="45" width="60" height="60" patternUnits="userSpaceOnUse">  <path d="M0,7.5C12.9,7.5 17.1,22.5 30,22.5C42.9,22.5 47.1,7.5 60,7.5" stroke="#fc0" stroke-width="1" fill="transparent"></path></pattern><linearGradient id="grad1" x1="0" x2="0.15" spreadMethod="repeat">  <stop offset="0%" stop-color="white" stop-opacity="1"></stop>  <stop offset="75%" stop-color="white" stop-opacity="0"></stop></linearGradient><linearGradient id="grad2" x1="0.5" x2="0.65" spreadMethod="repeat">  <stop offset="0%" stop-color="white" stop-opacity="1"></stop>  <stop offset="75%" stop-color="white" stop-opacity="0"></stop></linearGradient>
  </defs>
  <mask id="mask1"><rect fill="url(#grad1)" width="400" height="200"></rect>
  </mask>
  <mask id="mask2"><rect fill="url(#grad2)" width="400" height="200"></rect>
  </mask>
  <rect id="squiggle1" mask="url(#mask1)" fill="url(#patt1)" width="200" height="200"></rect>
  <rect id="squiggle2" mask="url(#mask2)" fill="url(#patt2)" width="200" height="200"></rect>
  <rect id="squiggle3" mask="url(#mask1)" fill="url(#patt3)" width="200" height="200"></rect>
  <rect id="squiggle4" mask="url(#mask2)" fill="url(#patt4)" width="200" height="200"></rect></svg>

.st0{fill:none;stroke:#000000;stroke-miterlimit:10;}.st1{fill:#7100BF;stroke:#000000;stroke-miterlimit:10;}.box{width: 600px;height: 600px;}

<div class="box"><svg width="200"xmlns="http://www.w3.org/2000/svg" viewBox="0 0 348 302" >
 <g><polygon id="XMLID_1_" class="st0" points="129,131.3 56.6,141 11.9,83.1 39.7,15.5 112.2,5.8 156.8,63.7 "/><path id="XMLID_2_" class="st0" d="M-305-84"/><polygon id="XMLID_3_" class="st1" points="39.7,15.5 11.9,83.1 56.6,141 84.4,73.4 "/><animateTransform                         attributeName="transform"                         attributeType="XML"                        dur="1s"                         type="translate"                         from="0 0"                         to="150 0"                         repeatCount="indefinite"/></g><g>
 <polygon id="XMLID_1_" class="st0" points="129,131.3 56.6,141 11.9,83.1 39.7,15.5 112.2,5.8 156.8,63.7 "/><path id="XMLID_2_" class="st0" d="M-305-84"/><polygon id="XMLID_3_" class="st1" points="39.7,15.5 11.9,83.1 56.6,141 84.4,73.4 "/><animateTransform                         attributeName="transform"                         attributeType="XML"                        dur="1s"                         type="translate"                         from="150 150"                         to="0 150"                         repeatCount="indefinite"/></g><g>
 <polygon id="XMLID_1_" class="st0" points="129,131.3 56.6,141 11.9,83.1 39.7,15.5 112.2,5.8 156.8,63.7 "/><path id="XMLID_2_" class="st0" d="M-305-84"/><polygon id="XMLID_3_" class="st1" points="39.7,15.5 11.9,83.1 56.6,141 84.4,73.4 "/><animateTransform                         attributeName="transform"                         attributeType="XML"                        dur="1s"                         type="translate"                         from="150 0"                         to="150 150"                         repeatCount="indefinite"/></g> <g><polygon id="XMLID_1_" class="st0" points="129,131.3 56.6,141 11.9,83.1 39.7,15.5 112.2,5.8 156.8,63.7 "/><path id="XMLID_2_" class="st0" d="M-305-84"/><polygon id="XMLID_3_" class="st1" points="39.7,15.5 11.9,83.1 56.6,141 84.4,73.4 "/><animateTransform             attributeName="transform"             attributeType="XML"            dur="1s"             type="translate"             from="0 150"             to="0 0"             repeatCount="indefinite"/></g></svg></div>