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 <button onclick="document.getElementById('test').innerHTML = console.log(coin.test = 10)">run 'coin.test = 10'</button>

<button onclick="document.getElementById('total').innerHTML = console.log(coin.total)">run 'coin.total'</button>

<button onclick="document.getElementById('heads').innerHTML = console.log(coin.heads)">run 'coin.heads'</button>
 
<p id="test"></p>
<p id="total"></p>

<p id="heads"></p>



<script>
function appendItem(list, item) {
  list.push(item);
}

function randomNumber(min, max) {
  return Math.floor(Math.random() * (max - min   1))   min;
}



var list = ["last","hi"];






    function template(l, o){
  
  var obj = this;
  
  this.list = l;
  
  this.options = o;
  
  Object.defineProperty(this, 'test', { 
    set: function(numberOfTests) {
      for(var i = 0; i < numberOfTests; i  ){
        appendItem(obj.list, obj.options[randomNumber(0, this.options.length - 1)]);
      }
      //console.log(obj.list);
      return obj.list;
      
    }
  });
  

  for(var i = 0; i < obj.options.length; i  ){
      console.log(i);
      Object.defineProperty(obj, obj.options[i], {
        value: obj.options[i]   ":  "   (obj.list.filter(function(option){return option == obj.options[i];}))
          
    
      });
  
      
    }
  
  Object.defineProperty(obj, 'total', { 
    get: function() {
      var totalList = [];
      for (var i = 0; i < obj.options.length; i  ){
        appendItem(totalList, obj.options[i]   ":  "   (obj.list.filter(function(option){return option == obj.options[i]}).length));
      }
      return totalList;
    }
  });
  
}





var coin = new template([], ["heads", "tails"]);
//var dice = new template([], ["one", "two", "three", "four", "five", "six"]);


coin.test = 10; //returns an array of "heads" and "tails"
//console.log(coin.total);
//console.log(coin.heads);


    






</script>