Android : Android, I Cant update the image src for untill another thread is sleeping 600 milis

I want to give the sensation that a button was pressed by the system. the two images are used when the user press and I want to create the same effect using a thread sleep between both images

But the system doesnt update the button src as expected. Resumming I want to chaneg the src, wait 600 milisec and update again

Can someone give me a direction on it?

        switch (color) {
            case 1: //green
                // first image
                Main.imageButtonGreen.setImageResource(R.drawable.light_green);

                //this is just to make it sleep to give the sensation that the button was pressed 
                try {
                    Blink blink = new Blink();
                    Thread t = new Thread(blink);
                    t.run();
                    t=null;
                }
                catch (Exception e){if (Main.debug) Log.d("Blink.blink Switch color= ", e.getMessage());}
                //scond image
                Main.imageButtonGreen.setImageResource(R.drawable.dark_green);
                break;