Cacher is the code snippet organizer for pro developers

body {
  counter-reset: number 0;           /* number のカウンタを 0 にセット */
}

h1:before {
  counter-increment: number 1;      /* number カウンタの増加数をセット */
  content: counter(number) " ";      /* 表示形式を指定 */
}

ol { 
    counter-reset: item;
    list-style-type: none;
}
li { display: block; }
li:before { 
    content: counter(item, decimal-leading-zero) " "; 
    counter-increment: item;
}