Triforce Typing Detection in Javascript

triforce.js

/*
*  ▲
* ▲ ▲
*
* Newfags can't triforce.
*
* TODO: detect on mac (white triangles) and test detection on linux
*/

var kpr = [],
    kcw = ['160','160','9650','13','9650','160','9650'];

function pushKey(k){
  if(kcw[kpr.length] && kcw[kpr.length].toString()==k){
    kpr.push(k);
    if(kpr.length === kcw.length){
       alert('  ▲\n▲ ▲\nTriforce111!!11!!ONEONE!1');
    }
  } else {
    kpr = [];
  }
  //console.log(kpr);
}
      
window.addEventListener("keypress", function(e){
   pushKey(e.keyCode.toString()); 
}, true);

//Konami Code! :D
kcw = ['38', '38', '40', '40', '37', '39', '37', '39', '66', '65'];