This.. is a pixel projection of an objects, underlying it is there's an object called cloud which is the projection and the objects below it is what then projected into the could's color, whereas every second, the pixel cloud checking whether it hit an object and then it'll project different color corresponding to the main set of which objects show which color. The reason why I care is because more people need to understand this mechanics from people that has made them to further appreciate the hardwork behind the scene, in which many would not care because due to big amount of people in the area that impacts on people perspective that maybe there will, one or another, to care about it, but no, the truth is piling the trash over and over won't change anything.
Anyways, this is so cool.