How do i angle a ki wave ?

   EWC.CFrame = CFrame.new(RH.Position,EWC.Position + Vector3.new(mouse.p.x*45,mouse.p.y*90,mouse.p.z*45))
       local EWL = Instance.new('Part',char)
       EWL.Anchored = true
       EWL.CanCollide = false
       EWL.Shape = 'Block'
       EWL.Material = 'Neon'
       EWL.Color = Color3.new(4,175,236)
       EWL.Size = Vector3.new(1,1,30)
       EWL.CFrame = RH.CFrame + EWC.CFrame.LookVector*15
       EWL.CFrame = CFrame.new(EWL.Position, EWL.Position + Vector3.new(mouse.p.x*45 - 45 ,mouse.p.y*90 - 90,mouse.p.z*45 - 45 ))
      wait(2)
      EWC:Destroy()
      EWL:Destroy()
     bv:Destroy()
	end
end)

http://youtu.be/P_HWlBo60o4 on the link you can see that it goes up and to the sides but it dont go down ;-; how can i make it go down?