@Venbha, the image is created using program code. Four different colors are drawn onto the four quadrants of a blank square image and the transparency is set to half. All actors use the same image at any one time.
A new version of this scenario was uploaded on 2017-12-08 20:16:25 UTC
@JadeGoody, not all scenarios have to be games. This is just something that is visually pleasing. Also, the code was made available so that others may take from it what they can.
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