 \vec{ u } 

 \vec{ v } 

O = Intersect(xAxis, yAxis)
U = Point(xAxis)
V = Point(yAxis)
u = Vector(O, U)
v = Vector(O, V)
i = (0, 1)
m = 1.8 (slider from 0 to 4, step 0.1)
P: m + 0 * i
Q: 0 + (4 - m) * i
A = Midpoint(Q, P)
c = Circle(A, P)
a = LineBisector(Q, P)
B, C = Intersect(c, a)