how to change outline radius code example

Example 1: css round outline

/*A box-shadow can be used for a similar effect*/

.your-box-or-button-class{
box-shadow: 0 0 3px #000000;
}

Example 2: outline-radius css

/*need perfix until now 4/23/2021*/

/*
-webkit- => Chrome, Safari, New Opera Version
-moz- => Firefox
-ms- => Ie, Edge
-o- => Old Version of Opera
*/

/* One value */
-moz-outline-radius: 25px;

/* Two values */
-moz-outline-radius: 25px 1em;

/* Three values */
-moz-outline-radius: 25px 1em 12%;

/* Four values */
-moz-outline-radius: 25px 1em 12% 4mm;

/* Global values */
-moz-outline-radius: inherit;
-moz-outline-radius: initial;
-moz-outline-radius: unset;