Asking multiple questions

We'll need to specify how many questions in our quiz and we'll need a counter to keep track.

additions to globals.js
var g_questions=3;
var g_count=0;

I set the number of questions to 3 to make testing quicker - we can change it later.

It makes sense to split up setup() like this:

function setup() {
  get_pic();
}
function get_pic() {
  Shuffle(g_ind);
  g_answer_id=Random0(4);
  var pic_n=g_ind[g_answer_id];
  var el=document.getElementById('pic');
  el.src='images/'+pic_n+'.jpg';
  for (var i=0;i<5;i++) {
    var el=document.getElementById(i);
    var pic_n=g_ind[i];
    el.textContent=g_pics[pic_n];
  }
}