1 - Using transformations create a scene consisting of a set of spheres arranged in a MxN grid structure.
2 - Generate the transformations in (1) according to a hierachical structure in two levels: grid and rows.
3 - Implement a Scene Graph, and add it to SDL.
4 - Use (3) to draw the scene in (2).
5 - Discuss alternatives to incorporate "object instancing" into a scene.