--dot-color: rgb(69 255 143 / 0.3);
--background-color: rgb(8 10 59 / 1);
--dot-size: 20;
--dot-size1: 10;
width: 500px;
height: 500px;
background:
radial-gradient(ellipse at 50% 50%, var(--dot-color) 0%, rgb(69 168 255 / 0) calc(var(--dot-size1) / 1 * 1%)) 0px 0px / calc(var(--dot-size) * 1px) calc(var(--dot-size) * 1px) repeat repeat, /* New Background */
linear-gradient(var(--background-color), var(--background-color)) 0px 0px / 100px 100px repeat repeat; /* New Background */Try different values. Your changes stay in this preview and never change the saved project.
Small, repeating dots, that are usually used as a background in infinite canvas applications like Figma.