This example relates to two features, firstly the new 'Loading Screen' defined in a recent C2 updated. And secondly an example of a colour changing effect.
An the example can be found in the arcade here. Click Here!
A tutorial for the 'Loading Screen' can be found elsewhere on this site within the tutorial section.
The colour changing effect is achieved by positioning two or more of the same (Different colour) sprite over the same position, then melding them together with the opacity function.
You can download the *.Capx file from here. Click Here! (Scroll down to the Loading Screen Table)