Im trying to change the speed of my body angular velocities , but they dont seem to work?

Hello, so what i'm trying to do is make a core thing, and if the health drops low enough it slows down at certain stages. So here is the code, but when I run it, I don't get errors but it just doesn't seem to work. ~~~~~~~~~~~~~~~~~

Health = script.Parent.Health.Value Cake = 1

repeat wait()

if Health < 75 and Health >= 50 then
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0.8,0.8,0)        
    script.Parent.Ring2.BodyAngularVelocity.AngularVelocity = Vector3.new(1,1,0)        
    script.Parent.Ring3.BodyAngularVelocity.AngularVelocity = Vector3.new(1.2,1.2,0)
    print("Minimal Damage")
elseif Health < 50 and Health >= 25 then
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0.6,0.6,0)
    script.Parent.Ring2.BodyAngularVelocity.AngularVelocity = Vector3.new(0.8,0.8,0)
    script.Parent.Ring3.BodyAngularVelocity.AngularVelocity = Vector3.new(1,1,0)
    print("Median Damage")
elseif Health < 25 and Health > 0 then
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0.4,0.4,0)        
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0.6,0.6,0)        
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0.8,0.8,0)
    print("Maximum Damage")     
elseif Health == 0 then
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0,0,0)        
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0,0,0)        
    script.Parent.Ring1.BodyAngularVelocity.AngularVelocity = Vector3.new(0,0,0)
    script.Parent.Core.BrickColor = BrickColor.new("Really red")
    print("Core Powering Down...Too Much Damage")       
end

until Cake < 1

~~~~~~~~~~~~~~~~~