Here on the left I made some normal shapes with shadows. First I made some pictures off blocs and other shapes with shadows and then I tried to copy them. 

Not everything went as plan but I tried my best.

On the drawing in the right you can see more basic forms and shapes.

On the left of this text-box you can see my practice drawing. I made this my black book so I can check if it works and if it looks good enough for the actual painting.

On the right of this text box you can see my painting. This is what  made. It is not the most beautiful thing I have ever made but is was difficult