Simple riot tag update

cookie.html

<div>
    When you eat <div onclick={addcookie}>{cookie} cookies</div> , you consume {calories} calories. That's {percent}% of your recommended daily calories.
</div>

<script>
  self.cookie = 3 //default amount

  addcookie(e) {
    self.cookie++
    self.updatecookie()
  }
  updatecookie() { //define function
    self.calories = self.cookie * 50
    self.percent = 100 * self.calories / 2100
  }
  self.updatecookie() //initialize other values
</script>