how to modify li css code example

Example: css style list

/* Choose the symbol, image or numeric for the bullet points on the list: */

/* SYMBOLS and NUMERICS */

ul {
  list-style-type: square;
}

ol {
  list-style-type:decimal;
}


/* IMAGES: */

li {
  margin: 0;
  padding: 15px 0 15px 60px;
  list-style: none;
  background-image: url("path_to_image");
  background-repeat: no-repeat;
  background-position: left center;
  background-size: 30px;
}



/* Define the color of each bullet point on the list */

ul {
  list-style: none; /* Remove list bullets */
  padding: 0;
  margin: 0;
}

li {
  padding-left: 16px;
}

li:before {
  content: "•";         /* Insert content that looks like bullets */
  padding-right: 8px;
  color: blue; 
}