javascript - How can i collect 4 small triangle shapes to make a big triangle? -

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i want make image background triangle made gathering 4small triangles,like image

enter image description here

how can make collection of triangle image background shapes?! 

.block {      width: 0;      height: 0;      border: solid 20px;          float: left;  }  .clear {      clear: both;  }  .top {      margin-left: 38px;  }  .top .left {          border-color: transparent green green transparent;  }  .top .right {          border-color: transparent transparent green green;  }  .bottom .left1 {          border-color: transparent red red transparent;  }  .bottom .mid1 {          border-color: blue blue red red;  }  .bottom .mid2 {          border-color: blue purple purple blue;  }  .bottom .right1 {          border-color: transparent transparent purple purple;  }
<div class="top">      <div class="block left"></div>      <div class="block right"></div>      <div class="clear"></div>  </div>  <div class="bottom">      <div class="block left1"></div>      <div class="block mid1"></div>      <div class="block mid2"></div>      <div class="block right1"></div>  </div>

enter link description here

as mentioned in comments, case in svg/canvas better solution. not expert @ them, creating simple pattern 1 want simple (i used background solution question):

<svg width="300" height="300">      <defs>          <pattern id="img1" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/people/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img2" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/animals/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img3" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/abstract/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img4" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/sports/" x="0" y="0" width="200" height="200"/>          </pattern>      </defs>      <path d="m150,0 225,150 75,150" fill="url(#img1)" />      <path d="m0,300 75,150 150,300" fill="url(#img2)" />      <path d="m75,150 225,150 150,300" fill="url(#img3)" />      <path d="m150,300 300,300 225,150" fill="url(#img4)" />  </svg>

edit: requested in comments below, added code show how manipulate elements (click on 2 triangles , images swap):

var step = 0;  var $prev;    $("path").on("click", function() {      switch (step) {          // if it's first step: save current element later          case 0:              step = 1;              $prev = $(this);              break;          // if it's second step: swap images , start again          case 1:              step = 0;              var aux = $prev.attr("fill");              $prev.attr("fill", $(this).attr("fill"));              $(this).attr("fill", aux);              break;      }  });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>  <svg width="300" height="300">      <defs>          <pattern id="img1" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/people/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img2" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/animals/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img3" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/abstract/" x="0" y="0" width="200" height="200" />          </pattern>          <pattern id="img4" width="100%" height="100%">              <image xlink:href="http://lorempixel.com/200/200/sports/" x="0" y="0" width="200" height="200"/>          </pattern>      </defs>      <path id="path1" stroke="black" d="m150,0 225,150 75,150 150,0" fill="url(#img1)" />      <path id="path2" stroke="black" d="m0,300 75,150 150,300 0,300" fill="url(#img2)" />      <path id="path3" stroke="black" d="m75,150 225,150 150,300 75,150" fill="url(#img3)" />      <path id="path4" stroke="black" d="m150,300 300,300 225,150 150,300" fill="url(#img4)" />  </svg>

you can see on jsfiddle: http://jsfiddle.net/4x7sh6bj/1/


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