When using the padding property; are you allowed to use negative values? code example

Example 1: padding 4 values

padding: top right bottom left;

padding: 1em 3px 30px 5px;  /* top:    1em padding  */
                            /* right:  3px padding  */
                            /* bottom: 30px padding */
                            /* left:   5px padding  */

Example 2: padding css shorthand

Syntax:
padding: top, right, bottom, left;

Example:
padding: 10px 15px 20px 25px;

/*What it means*/
padding from top 10px
padding from right 15px
padding from bottom 20px
padding from left 25px