In this last section, we will explore a number of objects to tackle some common interactive art/design situations. Most of them involve more advanced knowledge of the GEM library.
In a lot of design scenarios, we have a background image, instead of just the black background. In this case, we can use two gemhead objects, one for the background and the other for the foreground graphics. The gemhead object has a parameter to determine its render order.
If you have multiple gemhead objects in your patch, the render order depends on its render number, that is the number parameter in its specification. The default number is 50. The higher the number, the later it renders. In this example, the gemhead object with 50 renders first. The gemhead object with 55 renders later. In effect, the gemhead object 50 will be in the back, as a background layer. The gemhead object 55 will be in the front, as a foreground layer.
