s = -55 (slider from -510 to 500, step 35)
u = 90 (slider from -510 to 500, step 25)
parallelY = CurveCartesian(log(abs(s + (ί * t))), arg(s + (ί * t)), t, -500, 500)
parallelX = CurveCartesian(log(abs(t + (ί * u))), arg(t + (ί * u)), t, -500, 500)