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