code:

---

  
var dbltap = 0;
on_k = doubletap;
function doubletap
{
   if (dbltap > 0){return;}
   while (dbltap < 2)   // 2 is the max time before the second tap 
      {dbltap += time;
       if (key_k > 0)
          {dbl_tap = 10;  // any number > 2, to get us out of the loop
           do_the_function();}
       wait(1);}
   dbltap = 0;
}

function do_the_function
{
    beep;
}

---

-WildCat