INTRODUCTION OF THE LESSON
The lesson started correcting eventual errors and replying to questions and problems about the work of the previous lesson.

SECOND SECTION: AUTOCAD
We open autocad, organise the file - creating a general template - and the we started to build in autoCAD

CODE USE:
BOX
And the first vertex was the 0.0
The farthest vertex had the coordinates 0.5,0.5.0.1 - X,Y,Z respectively
We did ZOOM EXTENTS
By holding Shift and the mouse wheel we can visualize our 'box' three-dimensionally
Then in Custom View (in the upper left corner of the screen) or the command _VSCURRENT
We select the view X-Ray
We keep doing COPY
And selecting LAST And using the vertex 0.0
And we copy to the vertex 0.5,0.5,0
We change the color selecting the bottom left and top right 'boxes'and change it to red
Using the comman 3DORBIT
We can change the way of viewing the object we are working with
Then to multiply these 4 'boxes' we use the command
ARRAYCLASSIC
We select ALL
And we just finish builting our chessboard