i want to write text in graphics sprite

i want to write text in this sprite

i use thes method but not work when i add textfield to sprite the rect become very small

function drawRect():Sprite
        {
            var redRect:Sprite = new Sprite();
            redRect.graphics.beginFill(0xff0000);    // red
            redRect.graphics.drawRect(0,0,30, 30);
            redRect.graphics.endFill();
           
            var number:TextField =new TextField();
            number.text = "1";
           
            number.x= 15;
            number.y= 15;
            redRect.addChild(number);
           
            return redRect;
        }