How to use the Blur tool on Java to make Abstracts that look like this.
First, get a new Canvas of any size on Java. Then, color the whole canvas the color you want your abstract to be. I did brown.
Next, make some different colors in different areas. This part doesn't really matter. You need at least 2 different colors. The more colors that you have, the more interesting your abstract will be once it is finished.
After that, use the smear tool and smear it together so that it looks a little like this. Keep opacity and size and color the same for now. Try to smear out in all directions so that all the colors get blended in.
Stay on the smudge tool. Make size around 20. Turn Opacity, Color, and Blend to 100%. Next, make Spacing 50%, and turn Scattering to 500%. The toolbar on the side should look like this. This is a very critical step.
Now go everywhere with the settings that you're on. It is important not to go outside the canvas while doing this. Also, pick up the brush a lot so that some other colors get blended in too. You can do this however long you want to do until your satisfied.
After you've done that, make the size 50, turn Spacing down to 20% and make Scattering 200%. Smear around with that like you did before.
After this, slowly make the size larger and keep smearing. Don't go outside the canvas. You can stop when your happy with it or the size won't get any bigger.
This is my finished drawing. It doesn't have to look just like this. I hope you find this technique useful.