It is the manner of KOHSEI (Basic Art & Design) in which you think from the standpoint of centrifugal and multiplex structure. It also leads to a reconsidering within strict conditions the issues of the "arrangement" of overlapping · osculating · separate etc. stated in the preceding section.

(1) Selection of a unit

To make wide variations in a multiplex KOHSEI (Basic Art & Design), it is desirable that a unit have a simple geometrical shape. Besides, there is a need to choose the shape which has limitless possibilities, since problems surely occur in the process of grouping units, as a result of employing theories of the preceding section. Such problems include "the fusion of shapes", in which case shapes are fused into one, and "the shape of interspace" which is determined by the use of the surrounding units.

After due consideration for these things, I conceived one arrow shape. It is made when squares are cut obliquely and vertical (Fig. 148). This is a simple shape with its sides determined as 1:2:4:2Ö2, and its angles 45^o and 90^o only.
 
 

150   Figure 150: Device for a plan to make many shapes by fusion, in the case of A1+A1 (Fig. 149 of the                        previous page merly picked out eight examples from among the shapes of Fig. 150).

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