Graviton is a helper to create custom gravities visually.
Start graviton on the commandline via
ruby graviton.rb. Then just draw rectangles on the grid like e.g. via the rectangular masking tool from GIMP. Every new rectangle will have a different color to make it easier to distingish between each. To resize a rectangle press the left mouse button on one of the corners and move the mouse.
Following colors are used in graviton in given order:
cyan green olive teal blue silver lime navy purple magenta maroon red yellow gray