# Any idea?

**URL:** <https://forum.kirupa.com/t/any-idea/317643>\
**Category:** flash\
**Created:** [December 28, 2010, 2:52pm UTC](https://forum.kirupa.com/t/any-idea/317643 "2010-12-28T14:52:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denis\_dnl](https://avatars.discourse-cdn.com/v4/letter/d/35a633/32.png) [@denis\_dnl](https://forum.kirupa.com/u/denis_dnl)\
**Post date:** [December 28, 2010, 2:52pm UTC](https://forum.kirupa.com/t/any-idea/317643/1 "2010-12-28T14:52:51Z")

</div>

Hello guys!  
Today i tried to attach a movieclip using AS3, but i wanted to make the positioning inside the class.  
And i obtained an error:  
First file(Document class)

```php
package 
{ import test;
    import flash.display.*;
	public class main extends MovieClip
	{
		
		
		public function main()
		{
		   var mc:test=new test();
			mc.q=Math.random()*100;
			trace(mc.q)
			addChild(mc)
		}
		
	}
	
}

```

Second(MovieClip class):

```php
package 
{
	import flash.display.*;
	
public class test extends MovieClip {
	
	public var q:Number
	
	public function test():void
	{   
		setCoords()
		
	}
	
	public function setCoords():void
	{ 
	  
	   trace(q);
	   this.y=q;
	   this.x=q;
	   
	   
	}
}

```

At sequence mc.q=Math.random()\*100; in the trace from test.as it displays ‘NaN’. How can I modify the value of ‘q’ (public variable) via instance?  
If i use a function like mc.setCoords(x,y) the script works fine.

Thank you!