i found the error here what should i type in the constructor function between the braces
to call the function to the main time line
public function creation() {
that's my code in the fla file
//var createClass:creation = new Circle( this ); 
the constructor
package  {
import flash.display.InteractiveObject;
import flash.text.TextField;
import flash.text.TextFormat;
import flash.display.MovieClip;
public class creation extends MovieClip {
    // global variables
            public function creation():void {
            // constructor code
            for (i= 0 ; i<= 4; i++)
    {       first1[i]= createCustomTextField(0,(i*100),75,45);
            op[i]= createCustomTextField(150,(i*100),75,45);
            second[i]= createCustomTextField(300,(i*100),75,45);
            res[i]= createCustomTextField(450,(i*100),75,45);
            if (operation_Count == 1)
        {
            op[i].text = "+";
        }   else if (operation_Count == 2)
        {   
            op[i].text = "-";
        }else if (operation_Count == 3)
        {   
            op[i].text = "*";
        }else if (operation_Count == 4)
        {   
            op[i].text = "/";
        }
            first1[i].text = String(k1[i]=Math.round(Math.random()*10));
            second[i].text = String(k2[i]=Math.round(Math.random()*10));
        }
 }