class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val text = TextView(baseContext).apply { setBackgroundColor(Color.YELLOW) }

        val threadHelper = ThreadHelper(text)

        Handler().postDelayed({ threadHelper.runOnAnotherThread() }, 5000)
        Handler().postDelayed({ threadHelper.addText("Text1") }, 6000)
        Handler().postDelayed({ threadHelper.addText("Text2") }, 8000)
        Handler().postDelayed({ addContentView(text, ViewGroup.LayoutParams(500,500)) }, 10000)
    }
}