<div class="main">
  <div class="container">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </div>
</div>

<div class="panel">
<div>Size: [<span>100px</span>] <input type="range" min="20" max="200" step="10" value="100" name="s"></div>
<div>Ratio: [<span>1</span>] <input type="range" min="0" max="2" step="0.05" value="1" name="r"></div>
<div>Spacing: [<span>4px</span>]<input type="range" min="0" max="10" step="1" value="4" name="mv"></div>
<div>Clip-path<br>
hc: [<span>0.25</span>]<input type="range" min="0" max=".5" step=".05" value=".25" name="h"><br>
vc: [<span>0.35</span>]<input type="range" min="0" max=".5" step=".05" value=".35" name="v"></div></div>

.main {
  display: grid;
  grid-template-columns: repeat(auto-fit,calc(var(--s) + 2*var(--mh)));
  justify-content:center;
  --s: 100px; /* size */
  --r: 1; /* ratio */
  
  /* clip-path */
  --h: 0.25;  
  --v: 0.35; 
  --hc:calc(clamp(0,var(--h),0.5) * var(--s)) ;
  --vc:calc(clamp(0,var(--v),0.5) * var(--s) * var(--r)); 
  
  /*margin */
  --mv: 4px; /* vertical */
  --mh: calc(var(--mv) + (var(--s) - 2*var(--hc))/2); /* horizontal */
  /* for the float*/
  --f: calc(2*var(--s)*var(--r) + 4*var(--mv)  - 2*var(--vc) - 2px);
}

.container {
  grid-column: 1/-1;
  font-size: 0; /*disable white space between inline block element */
}

.container div {
  width: var(--s);
  margin: var(--mv) var(--mh);
  height: calc(var(--s)*var(--r)); 
  display: inline-block;
  font-size:initial;
  clip-path: polygon(var(--hc) 0, calc(100% - var(--hc)) 0,100% var(--vc),100% calc(100% - var(--vc)), calc(100% - var(--hc)) 100%,var(--hc) 100%,0 calc(100% - var(--vc)),0 var(--vc));
  background: red;
  margin-bottom: calc(var(--mv) - var(--vc)); 
}
.container div:nth-child(odd) {
  background:green;
}
.container::before{
  content: "";
  width: calc(var(--s)/2 + var(--mh));
  float: left;
  height: 120%;
  shape-outside: repeating-linear-gradient(     
                   #0000 0 calc(var(--f) - 2px),      
                   #000  0 var(--f));
}


.panel {position: fixed;top: 20px;right: 20px;padding: 10px;border: 1px solid;border-radius: 10px;background: #fff;font-family: sans-serif;opacity:.5}
.panel:hover {opacity:1}
.panel > div:not(:last-child) {border-bottom: 1px solid;padding-bottom: 10px;margin-bottom: 10px;}
*,*::before {transition:0.5s linear}
let inputs = document.querySelectorAll('input[type=range]')
let elem = document.querySelector('.main')


inputs.forEach(input => {
   input.addEventListener('change', function(e) {
      var p = e.target.getAttribute('name');
      if(p=="s" || p=="mv") {
        elem.style.setProperty("--"+p, this.value+"px");
	    	e.target.previousElementSibling.innerHTML = this.value+"px";
      } else { 
        elem.style.setProperty("--"+p, this.value);
  		  e.target.previousElementSibling.innerHTML = this.value;
      }
    });
});

External CSS

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External JavaScript

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