Get the vertical axis of object's array

Processing Coding Questions
3

Thank YOU!
by adding ortho it start to be what i want:

howMany = howMany + 0.01;
ortho(-width/2, width/2, -height/2, height/2); // Same as ortho()
translate(width/2, height/2);
rotateY(-QUARTER_PI - howMany);
rotateX(-QUARTER_PI);
translate(-4*16, -4*16, -4*16);

The number 4, where it come from? i can’t understand the process,
Thanks for suggestion, sure i will!
Gian