CodePen

HTML

            
              
            
          
!

↑ Insert the most common viewport meta tag

CSS

            
              $color: rgb(50,50,80)

html
  height: 100%
  +background(linear-gradient(45deg, rgba($color, .2) 50%, transparent 50%), linear-gradient(45deg, rgba($color, .1) 50%, rgba($color, .3) 50%), linear-gradient(45deg, rgba($color, .1) 50%, rgba($color, .2) 50%), linear-gradient(45deg, rgba($color, .1) 50%, rgba($color, .05) 50%), rgb(210,240,250))
  background-size: 2em 2em, 5em 5em, 7em 7em
  background-position: -1em -1em, 5em 5em, 7em 7em
  background-repeat: repeat
            
          
!
? ?
? ?
Must be a valid URL.
+ add another resource
via CSS Lint

JS

            
              
            
          
!
Must be a valid URL.
+ add another resource
via JS Hint
Loading ..................