<div id="seasonslist2">
   <p>
     <button onclick="makeSeasonsList();" type="submit">Click to append list of seasons     </button>
   </p>
 </div>

In script element within head element (<script>):

function makeSeasonsList() {
  ul_node = document.createElement("ul");
  let mydata= {"seasons":['Spring','Summer','Fall','Winter']}
;
  let seasons = mydata.seasons;
    for (i in mydata.seasons) {
      let mytext = i + " " + seasons[i];
      let text_node = document.createTextNode(mytext);
      let li_node = document.createElement("li");
      li_node.appendChild(text_node);
      ul_node.appendChild(li_node);
    };
    let container = document.getElementById("seasonslist2");
    container.appendChild(ul_node);
}