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HTML

              
                <svg>  
  <defs>
    <mask id="mask-1">
      <path class="mask-path" d="M100,80c150,150,250,-150,400,0" />  
    </mask>
    <mask id="mask-2">
      <path class="mask-path" d="M100,200 h400" />
    </mask>
    <mask id="mask-3">
      <path class="mask-path" d="M100,250 500,250" />
    </mask>
    <mask id="mask-4">
      <path class="mask-path" d="M100,300 L500,300" />
    </mask>
    <mask id="mask-5">
      <path class="mask-path" d="M100,350 c0,0 400,0 400,0" />
    </mask>
    <mask id="mask-6">
      <path class="mask-path" d="M100,400 C100,400 500,400 500,400" />
    </mask>
    <mask id="mask-7">
      <line class="mask-path" x1="100" y1="450" x2="500" y2="450" />
    </mask>
    <mask id="mask-8">
      <polyline class="mask-path" points="100,500 500,500" />
    </mask>
    <mask id="mask-9">
      <path class="mask-path" d="M550,180 v400" />
    </mask>
    <mask id="mask-10">
      <path class="mask-path" d="M600,180 600,580" />
    </mask>
    <mask id="mask-11">
      <path class="mask-path" d="M650,180 L650,580" />
    </mask>
    <mask id="mask-12">
      <path class="mask-path" d="M700,180 c0,0 0,400 0,400" />
    </mask>
    <mask id="mask-13">
      <path class="mask-path" d="M750,180 C750,180 750,580 750,580" />
    </mask>
    <mask id="mask-14">
      <line class="mask-path" x1="800" y1="180" x2="800" y2="580" />
    </mask>
    <mask id="mask-15">
      <polyline class="mask-path" points="850,180 850,580" />
    </mask>
  </defs>
    
  <path class="path" mask="url(#mask-1)" d="M100,80c150,150,250,-150,400,0" />
    
  <path class="path" mask="url(#mask-2)" d="M100,200 h400" />
  <path class="path" mask="url(#mask-3)" d="M100,250 500,250" />
  <path class="path" mask="url(#mask-4)" d="M100,300 L500,300" />
  <path class="path" mask="url(#mask-5)" d="M100,350 c0,0 400,0 400,0" />
  <path class="path" mask="url(#mask-6)" d="M100,400 C100,400 500,400 500,400" />
  <line class="path" mask="url(#mask-7)" x1="100" y1="450" x2="500" y2="450" />
  <polyline class="path" mask="url(#mask-8)" points="100,500 500,500" />
  
  <path class="path" mask="url(#mask-9)" d="M550,180 v400" />
  <path class="path" mask="url(#mask-10)" d="M600,180 600,580" />
  <path class="path" mask="url(#mask-11)" d="M650,180 L650,580" />
  <path class="path" mask="url(#mask-12)" d="M700,180 c0,0 0,400 0,400" />
  <path class="path" mask="url(#mask-13)" d="M750,180 C750,180 750,580 750,580" />
  <line class="path" mask="url(#mask-14)" x1="800" y1="180" x2="800" y2="580" />
  <polyline class="path" mask="url(#mask-15)" points="850,180 850,580" />
    
</svg>
              
            
!

CSS

              
                html, body {
  height: 100%;
}

body {
  overflow: hidden;
}

svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;  
}

.path {
  fill: none;
  stroke: red;
  stroke-width: 40;  
}

.mask-path {
  fill: none;
  stroke: #fff;
  stroke-width: 40;  
}
              
            
!

JS

              
                
              
            
!
999px

Console