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like this http://img689.imageshack.us/img689/8414/capturadepantalla201006bk.png

As it is now, your code paints the panel, and until the pause is finish it returns. Visually it would look like just the paint took too much time to finish, and not as you want to.

What you need to do is to have a "model" to paint. Your component would just paint that model and return.

What you need to do is to add more "things" to your model every second, and that's it.

As it is now, your code paints the panel, and until the pause is finish it returns. Visually it would look like the paint took too much time to finish.

What you need, is to have a "model" to paint. Your component would just paint that model and finish.

Then you add more "things" to your model every second, and that's it.

Short answer

You can use Thread.sleep but not from the paint method. Use it from outside and just reapaint your panel.

Long answer