We need controllers to control the IK handles and the joints.
The controller can be any objects.
Nurbs curve is common controller people use.
You can make a fancy shape with polygon, but it's westing time and confusing on shaded mode.
0. Nurbs circle curve is common controller.
1. I am going to make a box with a line.
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Trace all box corner.
Make sure, cover the all edges.
Then hit Enter to cmplete.
7. Move the polygon cube to the side and delete.
8. This is a box made of a line.
I am going to use this box as a rigging controller.
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