CST question

Hi,
I am working on a design which has parameters such as N (number of turns),s (spacing) etc.I am drawing a wire which has shape rectengular spiral and I draw wires according to N that is I draw 4*N wires.Also the lengths of wires depend on N. I want to change the shape when I changed N, that is when N is 20 there are 80 wires and when I enter N as 10 there are 40 wires.Also the lenghts of wires change by the change of N.When I drew a structure with N=20 and then changed N=10, the number of wires does not change (It is still 80 not 40).Only the lenghts of wires change according to formulas.Could you suggest me a way to change both number of wires and lenghts of wires at the sime time when I changed N.
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Hi
Write a small macro with a For I = 1 to N loop to generate the wires. This should only be a few lines of code....
F.