Problem with initialization of class object

1

I have two questions.
First: I created this class, which supposed to create sort of 3D cube

package 
{
    
    import flash.display.*;
    import flash.events.*;
    
    
    //additional libs
    import flash.text.*;


    public class Cube extends MovieClip
    {    
    

        public var star_commands:Vector.<int> = new Vector.<int>(12, true);
        public var star_coord:Vector.<Number> = new Vector.<Number>(24, true);

        public function Cube(xPos:Number,yPos:Number,size:Number)
        {
            
            star_commands[0] = 1;
            star_commands[1] = 2;
            star_commands[2] = 2;
            star_commands[3] = 2;
            star_commands[4] = 1;
            star_commands[5] = 2;
            star_commands[6] = 2;
            star_commands[7] = 2;
            star_commands[8] = 1;
            star_commands[9] = 2;
            star_commands[10] = 2;
            star_commands[11] = 2;
        
            
            star_coord[0] = xPos; //x
            star_coord[1] = yPos; //y 
            
            star_coord[2] = xPos; 
            star_coord[3] = yPos + size; 
            
            star_coord[4] = xPos + size; 
            star_coord[5] = yPos + size; 
            
            star_coord[6] = xPos + size; 
            star_coord[7] = yPos; 
            
            star_coord[8] = xPos; 
            star_coord[9] = yPos; 
            
            star_coord[10] = xPos + size/2; 
            star_coord[11] = yPos - size/2; 
            
            star_coord[12] = xPos + size/2 + size;
            star_coord[13] = yPos - size/2; 
            
            star_coord[14] = xPos + 40; 
            star_coord[15] = yPos; 
        
            star_coord[16] = xPos + size; 
            star_coord[17] = yPos + size;
            
            star_coord[18] = xPos + size + size/2;
            star_coord[19] = yPos + size - size/2; 
            
            star_coord[20] = xPos + size/2 + size; 
            star_coord[21] = yPos - size/2; 
            
            star_coord[22] = xPos + size; 
            star_coord[23] = yPos; 
        
            
            graphics.beginFill(0x003366);
            graphics.drawPath(star_commands, star_coord);
            graphics.endFill();
            graphics.lineStyle(2,0x000000);
            graphics.moveTo(xPos,yPos);
            graphics.lineTo(xPos,yPos+size);
            graphics.lineTo(xPos + size,yPos + size);
            graphics.lineTo(xPos + size,yPos);
            graphics.lineTo(xPos,yPos);
            graphics.lineTo(xPos + size/2,yPos - size/2);
            graphics.lineTo(xPos + size*1.5,yPos - size/2);
            graphics.lineTo(xPos + size,yPos);
            graphics.moveTo(xPos + size,yPos + size);
            graphics.lineTo(xPos + size*1.5,yPos + size*0.5)
            graphics.lineTo(xPos + size*1.5,yPos - size*0.5)            
        }
        
        
    }
    
    
}

then in my fla file in frame one I try to call the class by


var cusbe:MovieClip;
cusbe = new Cube(100,100,10);

and i get this error

ArgumentError: Error #1063: Argument count mismatch on Cube(). Expected 3, got 0.

So my question is why am I getting this error. I pass 3 arguments to the class ?

The second question is related to the above class as well. What I’m trying to do is to have a class that creates a cube and then I can just use it anywhere in my animations. SO is this the most efficient way to have it done this way (meaning as a class and then the vectors as I have there)?
Many thanks