JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="generate(40000);">Generate</button>
<table>
<tr>
  <td>fail</td>
  <td id="0">0</td>
</tr>
<tr>
  <td>C0</td>
  <td id="1">0</td>
</tr>
<tr>
  <td>C1+</td>
  <td id="2">0</td>
</tr>
<tr>
  <td>total</td>
  <td id="total">0</td>
</tr>

</table>

JavaScript

function generate(pull) {
pull = Math.floor(pull/160);

for(var n = 0; n < 100; n++){

var num = 0,
banner= 0,
pity = 0;

	for(var i = 0; i < pull; i++) {
  num++;
  var prob = Math.random();
  	if( num > 73) {
    	var prob = 0.006 + (num-73)*0.06;
    } else {
    	var prob = 0.006;
    }
    
    if(Math.random() < prob ) {
    	if(Math.random() < 0.5 | pity==1) {
      	banner++;
      	pity = 0;
      } else {
      	pity++;
      }
      num = 0;
    }
  
	}
  
  if(banner > 2) banner = 2;
  
  count = document.getElementById(banner).innerHTML;
  count++;
  document.getElementById(banner).innerHTML = count;
  
  total = document.getElementById("total").innerHTML;
  total++;
  document.getElementById("total").innerHTML = total;
 
}
}