glue.
proceed the same process for the middle design choosing different pattern.
here i drew a mirror image of first pattern.
place the first pattern and the plain new white paper one on another. while placing make sure that the first pattern is reversed.
repeat the procedure in step 3.
stick the three patterns together using glue and pin them to wall. to positive here, and then go negative here.
this is a little bit unusual.
interested in at this current time because everything maps back to that interval.
subtract to pi until we fall back into the minus pi, pi interval.
so here's the same plot as before but with the phase wrapped. 