A = Intersect(xAxis, yAxis)
c = Circle(A, 1)
B = (1, 1)
z2 = Vector(A, B)
C = Intersect(c, a, 1)
z3 = Vector(A, C)
D = Point(xAxis)
z1 = Vector(A, D)
E = Intersect(c, yAxis, 1)
z4 = Vector(A, E)