otborniy_govnocode.kt

class CounterThread : Thread() {

    private lateinit var handler: Handler

    override fun run() {
        Looper.prepare()

        handler = object: Handler() {
            private var counter = 100

            override fun handleMessage(msg: Message) {
                counter += msg.arg1
                if (msg.arg1 == -1) handler.sendMessageDelayed(Message.obtain(msg), 1000)
                Log.e("CounterThread", "$counter")
            }
        }

        handler.sendMessage(Message().apply { arg1 = -1 })

        Looper.loop()
    }
       
    fun increment20() = handler.sendMessage(Message().apply { arg1 = 20 })   
}