html {
  --stripes: linear-gradient(
    var(--stripes-angle, to right),
    powderblue 20%,
    pink 20% 40%,
    white 40% 60%,
    pink 60% 80%,
    powderblue 80%
  );
}

body {
  background-image: var(--stripes);
}

/* [style*='--stripes-angle'] */