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HTML

CSS

CSS Base

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JavaScript

Babel includes JSX processing.

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Editor Settings

Code Indentation

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HTML

              
                - var ok = 2001
.body
  while (ok--)
   ok(tabindex=0)
   //-=ok
              
            
!

CSS

              
                magnif = 2
gridbase = 16px*magnif
gridgap = 3px*magnif
body
  background #000
.body
 display grid
 grid-template-columns repeat(auto-fill,minmax(gridbase, 1fr))
 grid-gap gridgap
 grid-auto-rows minmax(gridbase,max-content)
 grid-auto-flow dense
ok
 text-align center
 vertical-align middle
 background yellow
 &:nth-child(even)
   background complement(royalblue)
 &:nth-child(odd)
   border-radius 20%
 &:nth-child(7n)
   grid-column auto \/ span 3
   background #00f
 &:nth-child(13n)
  grid-column auto \/ span 5
  background #0f0
 &:nth-child(5n)
   grid-row auto \/ span 2
   background #f00
 &:nth-child(37n)
  grid-row auto \/ span 12
  background #066
 &:last-child
   grid-area auto \/ span all \/ auto \/ span all
   background #f0f
 &:focus
   filter invert(1)
              
            
!

JS

              
                
              
            
!
999px

Console