...move it after the {. And also, wait(x); waits by frames, not ticks. use wait(-x); to wait seconds. ex: wait(-0.5); = wait half a second...

Code:

---

action lalala
{
     var looptime;
     while (1)
     {
          randomize();
          looptime=int(random(100))+20;
          wait(looptime); // wait between 20 and 120 ticks
          c_move (blahblahblah);
     }
}

---

Even better, use entity skills instead!

Code:

---

action lalala
{
     while (1)
     {
          randomize();
          my.skill1 = int(random(100))+20;
          wait(-my.skill1); // wait between 20 and 120 ticks
          c_move (blahblahblah);
     }
}

---