Improved ZenCocoon's pattern

gistfile1.txt

background: 
  linear-gradient(63deg, #131313 5px, transparent 5px) 0 5px,
  linear-gradient(243deg, #131313 5px, transparent 5px) 10px 0,
  linear-gradient(63deg, #242424 5px, transparent 5px) 0 10px,
  linear-gradient(243deg, #242424 5px, transparent 5px) 10px 5px,
  linear-gradient(63deg, #1d1d1d 5px, transparent 5px) 0 15px,
  linear-gradient(243deg, #1d1d1d 5px, transparent 5px) 10px 10px,
  linear-gradient(63deg, #1a1a1a 5px, transparent 5px) 0 20px,
  linear-gradient(243deg, #1a1a1a 5px, transparent 5px) 10px 15px,
  linear-gradient(#1b1b1b 5px, #1c1c1c 5px, #1c1c1c 10px, transparent 10px, transparent 15px, #222 15px, #222 20px);
background-color: #151515;
background-size: 20px 20px;