width: 500px;
height: 500px;
background:
radial-gradient(ellipse at 50% 121%, rgba(255,255,255,0) 16%, rgba(255,69,118,1) 23%, rgba(247,213,84,1) 30%, rgba(41,192,56,1) 38%, rgba(69,168,255,1) 46%, rgba(103,0,205,1) 54%, rgba(238,0,255,1) 62%, rgba(255,255,255,0) 71%) -39px 103px / 584px 246px no-repeat no-repeat, /* Gradient 1 */
linear-gradient(0deg, rgba(69,175,255,1) 0%, 50%, rgba(182,69,255,1) 100%) 0px 0px / 500px 1000px no-repeat no-repeat; /* Gradient 3 */