In android, I am trying to display Ready Set Go one at a time with a slight delay before overwriting the next one.  

This doesn't work for me. I get the pause but no text is written.
Here is what I have tried so far any help is appreciated!

Once a user clicks the `Button` the on click calls readySetGo

```
@Override
public void onClick(View v) {
    // TODO Auto-generated method stub

    switch (v.getId()) {
    case R.id.button_start_pause:
        readySetGo();               
        break;

    default:
        break;
    }
}

public void readySetGo() {

    text_timer.setText("Ready");
    SystemClock.sleep(2000);
            text_timer.setText("Set");
            SystemClock.sleep(2000);
            text_timer.setText("Go!!");

}

```