how to give box shadown in css code example

Example 1: css box shadow

/* offset-x | offset-y | blur-radius | spread-radius | color */
box-shadow: 2px 2px 2px 1px rgba(0, 0, 0, 0.2);

Example 2: box shadow

/* offset-x, offset-y, (blur-radius and/or spread-radius=optional) and color */
selector {
  box-shadow: offset-x offset-y (blur-radius and/or spread-radius=optional) color;
}

/* Example */
.test-shadow {
	box-shadow: 4px 4px 20px 0px #888888;
}