override fun surfaceCreated(holder: SurfaceHolder) {
        doAnimate = true
        GlobalScope.launch {
            while (doAnimate && isAttachedToWindow) {
                synchronized(holder) {
                    val canvas = holder.lockCanvas()
                    canvas?.let {
                        drawAnimate.draw(it)
                        holder.unlockCanvasAndPost(it)
                    }
                }
            }
        }
    }