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HTML 

              
                <div class="nyan-cat"></div>
!

CSS 

              
                .nyan-cat {
  position: relative;
  width: 82px;
  height: 82px;
  margin-top: 50px;
  animation: 4s linear 0s infinite move;
}

@keyframes move { 
  from { 
    margin-left: 0%; 
  }
  to { 
    margin-left: 80%; 
  }  
}

.nyan-cat::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 2px;
  height: 2px;
  
  /* with help of https://itleadassist.io/ru/projects/css-pixel-generator */ 
  box-shadow: 0px 24px #ff0505, 2px 24px #ff0505, 4px 24px #ff0505, 6px 24px #ff0505, 0px 26px #ff0505, 2px 26px #ff0505, 4px 26px #ff0505, 6px 26px #ff0505, 0px 28px #ff0505, 2px 28px #ff0505, 4px 28px #ff0505, 6px 28px #ff0505, 8px 28px #ff0505, 10px 28px #ff0505, 12px 28px #ff0505, 14px 28px #ff0505, 0px 30px #fd9608, 2px 30px #fd9608, 4px 30px #fd9608, 6px 30px #fd9608, 8px 30px #ff0505, 10px 30px #ff0505, 12px 30px #ff0505, 14px 30px #ff0505, 32px 30px #000000, 34px 30px #000000, 36px 30px #000000, 38px 30px #000000, 40px 30px #000000, 42px 30px #000000, 44px 30px #000000, 46px 30px #000000, 48px 30px #000000, 50px 30px #000000, 52px 30px #000000, 54px 30px #000000, 56px 30px #000000, 58px 30px #000000, 60px 30px #000000, 62px 30px #000000, 64px 30px #000000, 0px 32px #fd9608, 2px 32px #fd9608, 4px 32px #fd9608, 6px 32px #fd9608, 8px 32px #ff0505, 10px 32px #ff0505, 12px 32px #ff0505, 14px 32px #ff0505, 16px 32px #ff0505, 18px 32px #ff0505, 20px 32px #ff0505, 22px 32px #ff0505, 24px 32px #ff0505, 26px 32px #ff0505, 30px 32px #000000, 32px 32px #f9edd7, 34px 32px #f9edd7, 36px 32px #f9edd7, 38px 32px #f9edd7, 40px 32px #f9edd7, 42px 32px #f9edd7, 44px 32px #f9edd7, 46px 32px #f9edd7, 48px 32px #f9edd7, 50px 32px #f9edd7, 52px 32px #f9edd7, 54px 32px #f9edd7, 56px 32px #f9edd7, 58px 32px #f9edd7, 60px 32px #f9edd7, 62px 32px #f9edd7, 64px 32px #f9edd7, 66px 32px #000000, 0px 34px #fd9608, 2px 34px #fd9608, 4px 34px #fd9608, 6px 34px #fd9608, 8px 34px #fd9608, 10px 34px #fd9608, 12px 34px #fd9608, 14px 34px #fd9608, 16px 34px #ff0505, 18px 34px #ff0505, 20px 34px #ff0505, 22px 34px #ff0505, 24px 34px #ff0505, 26px 34px #ff0505, 28px 34px #000000, 30px 34px #f9edd7, 32px 34px #f9edd7, 34px 34px #f9cdcd, 36px 34px #f9cdcd, 38px 34px #f9cdcd, 40px 34px #f9cdcd, 42px 34px #f9cdcd, 44px 34px #f9cdcd, 46px 34px #f9cdcd, 48px 34px #f9cdcd, 50px 34px #f9cdcd, 52px 34px #f9cdcd, 54px 34px #f9cdcd, 56px 34px #f9cdcd, 58px 34px #f9cdcd, 60px 34px #f9cdcd, 62px 34px 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64px #000000, 48px 64px #000000, 50px 64px #000000, 52px 64px #000000, 54px 64px #000000, 56px 64px #000000, 58px 64px #000000, 60px 64px #000000, 62px 64px #000000, 64px 64px #000000, 66px 64px #000000, 68px 64px #000000, 4px 66px #6423fb, 6px 66px #6423fb, 8px 66px #6423fb, 10px 66px #6423fb, 12px 66px #6423fb, 14px 66px #6423fb, 16px 66px #6423fb, 18px 66px #6423fb, 20px 66px #6423fb, 22px 66px #000000, 24px 66px #d1d1d1, 26px 66px #d1d1d1, 28px 66px #000000, 32px 66px #000000, 34px 66px #d1d1d1, 36px 66px #d1d1d1, 38px 66px #000000, 50px 66px #000000, 52px 66px #d1d1d1, 54px 66px #d1d1d1, 56px 66px #000000, 60px 66px #000000, 62px 66px #d1d1d1, 64px 66px #d1d1d1, 66px 66px #d1d1d1, 68px 66px #000000, 4px 68px #6423fb, 6px 68px #6423fb, 8px 68px #6423fb, 10px 68px #6423fb, 12px 68px #6423fb, 14px 68px #6423fb, 16px 68px #6423fb, 18px 68px #6423fb, 20px 68px #6423fb, 22px 68px #6423fb, 24px 68px #000000, 26px 68px #000000, 32px 68px #000000, 34px 68px #000000, 36px 68px #000000, 50px 68px #000000, 52px 68px #000000, 54px 68px #000000, 62px 68px #000000, 64px 68px #000000, 66px 68px #000000;
}
!

JS
!
999px

Console