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CSS

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CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class="maze-1"></div>
<div class="maze-2"></div>
<div class="maze-3"></div>
<div class="maze-4"></div>
<div class="maze-5"></div>
<div class="maze-6"></div>
<div class="maze-7"></div>
<div class="maze-8"></div>
<div class="maze-9"></div>
<div class="maze-10"></div>
!

CSS 

              
                .maze-1 {
  width:40px;
  aspect-ratio:1;
  outline:2px solid #fff;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0),
    conic-gradient(from -90deg at 30px 30px,#0000 90deg,#fff 0);
  animation:m1 1.5s infinite;
}
@keyframes m1 {
  0%   {background-position:0    0}
  25%  {background-position:100% 0}
  50%  {background-position:100% 100%}
  75%  {background-position:0    100%}
  100% {background-position:0     0}
}

.maze-2 {
  width:70px;
  height:40px;
  outline:2px solid #fff;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    linear-gradient(#fff 0 0) center/10px 100% no-repeat,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0),
    conic-gradient(from -90deg at 60px 30px,#0000 90deg,#fff 0);
  animation:m2 2s infinite;
}
@keyframes m2 {
  0%    {background-position:0    0   ,center}
  12.5% {background-position:50%  0   ,center}
  25%   {background-position:50%  100%,center}
  37.5% {background-position:100% 100%,center}
  50%   {background-position:100% 0   ,center}
  62.5% {background-position:50%  0   ,center}
  75%   {background-position:50%  100%,center}
  82.5% {background-position:0    100%,center}
  100%  {background-position:0    0   ,center}
}

.maze-3 {
  width:40px;
  aspect-ratio:1;
  outline:2px solid #fff;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0),
    conic-gradient(from -90deg at 30px 30px,#0000 90deg,#fff 0);
  animation:m3 1.5s infinite;
}
@keyframes m3 {
  0%   {background-position:0    0   ;clip-path:circle(15px at left  4px top    4px)}
  25%  {background-position:100% 0   ;clip-path:circle(15px at right 4px top    4px)}
  50%  {background-position:100% 100%;clip-path:circle(15px at right 4px bottom 4px)}
  75%  {background-position:0    100%;clip-path:circle(15px at left  4px bottom 4px)}
  100% {background-position:0    0   ;clip-path:circle(15px at left  4px top    4px)}
}

.maze-4 {
  width:70px;
  height:40px;
  outline:2px solid #fff;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    linear-gradient(#fff 0 0) center/10px 100% no-repeat,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0),
    conic-gradient(from -90deg at 60px 30px,#0000 90deg,#fff 0);
  animation:m4 2s infinite;
}
@keyframes m4 {
  0%    {background-position:0    0   ,center;clip-path:circle(15px at left  4px top    4px)}
  12.5% {background-position:50%  0   ,center;clip-path:circle(15px at left  50% top    4px)}
  25%   {background-position:50%  100%,center;clip-path:circle(15px at left  50% bottom 4px)}
  37.5% {background-position:100% 100%,center;clip-path:circle(15px at right 4px bottom 4px)}
  50%   {background-position:100% 0   ,center;clip-path:circle(15px at right 4px top    4px)}
  62.5% {background-position:50%  0   ,center;clip-path:circle(15px at right 50% top    4px)}
  75%   {background-position:50%  100%,center;clip-path:circle(15px at right 50% bottom 4px)}
  82.5% {background-position:0    100%,center;clip-path:circle(15px at left  4px bottom 4px)}
  100%  {background-position:0    0   ,center;clip-path:circle(15px at left  4px top    4px)}
}

.maze-5 {
  width: 70px;
  aspect-ratio: 1;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    conic-gradient(from -90deg at 30px 30px,#0000 90deg,#fff 0) 0 0/40px 40px ,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0) 0 0/40px 40px no-repeat,
    conic-gradient(from -90deg at 30px 30px,#0000 90deg,#fff 0) 100% 100%/40px 40px no-repeat;
  animation:m5 2s infinite;
}
@keyframes m5 {
  0%     {background-position:left 1px top 1px,0 0,0 0,100% 100%}
  16.67% {background-position:left 50% top 1px,0 0,0 0,100% 100%}
  33.33% {background-position:left 50% bottom 1px,0 0,0 0,100% 100%}
  50%    {background-position:right 1px bottom 1px,0 0,0 0,100% 100%}
  66.67% {background-position:right 1px bottom 50%,0 0,0 0,100% 100%}
  83.33% {background-position:left 1px bottom 50%,0 0,0 0,100% 100%}
  100%   {background-position:left 1px top 1px,0 0,0 0,100% 100%}
}

.maze-6 {
  width: 70px;
  aspect-ratio: 2;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px,
    linear-gradient(#fff 0 0) 100% 0/30px 10px,
    linear-gradient(#fff 0 0) 0 100%/30px 10px,
    repeating-linear-gradient(90deg,#fff 0 10px,#0000 0 30px);
  background-repeat:no-repeat;
  animation:m6 2s infinite;
}
@keyframes m6 {
  0%    {background-position:left 1px bottom 1px,100% 0,0 100%,0 0}
  12.5% {background-position:left 50% bottom 1px,100% 0,0 100%,0 0}
  25%   {background-position:left 50% top 1px,100% 0,0 100%,0 0}
  37.5% {background-position:right 1px top 1px,100% 0,0 100%,0 0}
  50%   {background-position:right 1px bottom 1px,0 0,100% 100%,0 0}
  62.5% {background-position:right 50% bottom 1px,0 0,100% 100%,0 0}
  75%   {background-position:right 50% top 1px,0 0,100% 100%,0 0}
  87.5% {background-position:left 1px top 1px,0 0,100% 100%,0 0}
  100%  {background-position:left 1px bottom 1px,100% 0,0 100%,0 0}
}

.maze-7 {
  width: 40px;
  aspect-ratio: 1;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 50%/8px 8px no-repeat,
    conic-gradient(from -90deg at 15px 15px,#0000 90deg,#fff 0) 0 0/25px 25px;
  animation:m7 1s infinite;
}
@keyframes m7 {
  0%   {background-position:50%,0 0}
  50%  {background-position:50%,25px 0}
  100% {background-position:50%,25px 25px}
}

.maze-8 {
  width: 40px;
  aspect-ratio: 1;
  background:
    radial-gradient(farthest-side,#000 90%,#0000) 50%/8px 8px no-repeat,
    conic-gradient(from -90deg at 15px 15px,#0000 90deg,#fff 0) 0 0/25px 25px;
  animation:m8 1.5s infinite;
}
@keyframes m8 {
  0%     {background-position:left -10px top 50%,0 0}
  50%    {background-position:right -10px top 50%,0 0}
  50.01% {background-position:right 50% top -10px,0 0}
  100%   {background-position:right 50% bottom -10px,0 0}
}

.maze-9 {
  width:70px;
  height:40px;
  outline:2px solid #fff;
  background:
    radial-gradient(farthest-side,red 90%,#0000) 0 0/8px 8px no-repeat,
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px no-repeat,
    linear-gradient(#fff 0 0) center/10px 100% no-repeat,
    conic-gradient(from  90deg at 10px 10px,#0000 90deg,#fff 0),
    conic-gradient(from -90deg at 60px 30px,#0000 90deg,#fff 0);
  animation:m9 2s infinite;
}
@keyframes m9 {
  0%    {background-position:50%  100%,0    0   ,center}
  12.5% {background-position:0    100%,50%  0   ,center}
  25%   {background-position:0    0   ,50%  100%,center}
  37.5% {background-position:50%  0   ,100% 100%,center}
  50%   {background-position:50%  100%,100% 0   ,center}
  62.5% {background-position:100% 100%,50%  0   ,center}
  75%   {background-position:100% 0   ,50%  100%,center}
  82.5% {background-position:50%  0   ,0    100%,center}
  100%  {background-position:50%  100%,0    0   ,center}
}

.maze-10 {
  height:30px;
  aspect-ratio:2;
  background:
    radial-gradient(farthest-side,red 90%,#0000) 0 0/8px 8px,
    radial-gradient(farthest-side,red 90%,#0000) 0 0/8px 8px,
    radial-gradient(farthest-side,red 90%,#0000) 0 0/8px 8px,
    radial-gradient(farthest-side,red 90%,#0000) 0 0/8px 8px,
    radial-gradient(farthest-side,#000 90%,#0000) 0 0/8px 8px,
    linear-gradient(#fff 0 0) center/100% 10px ,
    linear-gradient(#fff 0 0) right/50% 100%;
  background-repeat:no-repeat;
  animation:m10 2s infinite;
}
@keyframes m10 {
  0% {background-position:top 1px right 1px,right 1px bottom 1px,top 1px left 31px,bottom 1px left 31px, -10px 50%,50%,right}
  50%,
  60%{background-position:top 1px right 1px,right 1px bottom 1px,top 1px left 31px,bottom 1px left 31px,left 75% top 50%,50%,right}
  80% {background-position:75% 50%,75% 50%,75% 50%,75% 50%,left 75% top 50%,50%,right}
  80.01% {background-position:75% 50%,75% 50%,75% 50%,75% 50%,-10px 50%,50%,right}
  100%{background-position:top 1px right 1px,right 1px bottom 1px,top 1px left 31px,bottom 1px left 31px,-10px 50%,50%,right}
} 
 
/**/
body {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
  grid-auto-rows: 130px;
  place-items:center;
  background:#000;
}

* {
  box-sizing: border-box;
}
!

JS
!
999px

Console