How would i tween a part's CFrame position and rotation in one tween?

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I’m trying to make a beam that when it appears, goes towards the cursor (does not follow once spawned) and rotates on its Y axis multiples times before dissapearing. The part has child parts welded using WeldConstraints, so i have to use CFrames to reposition it.

I can easily make the beam move towards the destination position, but whenever i add the rotation factor, everything breaks. The beam either

  • Goes to 0,0,0
  • Rotates itself relative to the world towards 0,90,0
  • Changes trajectory by 90 to its right
  • Rotates only 90 degrees

As of now, this is what i have written:


sword.CFrame = CFrame.new(hrp.Position + hrp.CFrame.LookVector * 3, MouseP)

local repeatcount = 4
local pos = sword.CFrame.LookVector*100/repeatcount
for i = 1, repeatcount do
	local tween = game:GetService("TweenService"):Create(sword, TweenInfo.new(1.4/repeatcount, Enum.EasingStyle.Linear, Enum.EasingDirection.InOut), {CFrame = CFrame.new(sword.Position+pos)*CFrame.Angles(0,sword.CFrame.Rotation.Y+math.rad(90),0)})
	tween:Play()
	tween.Completed:Wait()
end

This specific code gives me the 3 last problems, all at once. I have not a single idea how i can fix it.

Please take into account the fact i need both the Position and Rotation in CFrames. I cannot find any answers taking every criteria into account on this forum. Thank you.

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