width: 500px;
height: 500px;
background:
conic-gradient(from -45deg at 50% 50%, rgba(255,69,69,1) 24%, rgba(245,21,21,1) 25%, rgba(217,10,10,1) 49%, rgba(193,7,7,1) 50%, rgba(193,7,7,1) 74%, rgba(175,4,4,1) 75%) 0px 0px / 50px 50px repeat repeat; /* Pyramids */