html {	
	--u: 2vmin; /* change size */
	--c1: #673ab7;
  --c2: #5c379f;
	--s1: #0002;
  --gp: 50%/calc(var(--u) * 10) calc(var(--u) * 10);
	height: 100vh;
	background: 
		repeating-conic-gradient(from 0deg at 50% 13.75%, var(--s1) 0 20.55%, #fff0 21.05% 79.13%, var(--s1) 79.63% 100% ) var(--gp), 
		repeating-conic-gradient(from 0deg at 50% 50%, #fff0 0 25%, var(--s1) 25% 29%, #fff0 30% 70%, var(--s1) 71% 75%, #fff0 75% 100%) var(--gp), 
		repeating-conic-gradient(from 0deg at 50% 50%, var(--c1) 0 25%, var(--c2) 0% 50%, var(--c1) 0 75%, var(--c2) 0% 100% ) var(--gp);
}

//Inspired by this pen: https://codepen.io/cassie-codes/details/KKMqoQG by Cassie Evans