Watch paints draining. While watching every single color, you can't make any pause (just keep your game turned on). That's a main point.

But there is something more to explain.

On the first "run" we can select one of nine colors. After watching how all 9 paints going to dry you will get... 2 achievements.

How to get other achevements?
Watch another 9 draining paints!


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After completing first list, on the upper right corner a gray arrow will appears.


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Click on it and keep watching.
This time you can get an achievement for every single watched paint. Yay.

108 hours.

I regret.