神スクボ
code:style.css
body {
background:
repeating-linear-gradient( 0deg,
transparent 0px 9px,
silver 10px,
transparent 11px 15px
),
repeating-linear-gradient( 90deg,
var(--body-bg, transparent) 0px 9px,
silver 10px,
var(--body-bg, transparent) 11px 15px
);
}