How do I make laser fingers stop moving right arm and aim the laser right away?

Hello.

I would like to know how to make Laser Fingers point at the cursor when my right arm is still and not moving.

Laser Fingers are a gear made by ROBLOX consisting of a red laser (draining health), a green laser (adding health) and a blue laser (pushing the humanoid target). By simply clicking left mouse button, the type and color of the laser are changed. The lasers shoot always when the tool is equipped.

However, I wish to change it a little bit.

I want to make it have the only blue laser and not moving the right arm.

I succeeded in leaving only the blue laser, but I still struggle with making the arm completely still and only the laser pointing at the cursor.

I tried to delete lines regarding the arm, but it did not work.

The tool is composed of a LocalScript and a Handle (Handle is with Audio and Mesh in it).

The whole script looks like this:

--[[Super Util]]--
function WaitForChild(parent,...)
    local debugPrint = false
    for _, i in ipairs({...}) do
        if type(i)=='boolean' then
            debugPrint = i
        else
            while not parent:FindFirstChild(i) do  
                wait(1/30) 
                if debugPrint then
                    print(script.Name..':'..parent.Name..' Waiting for '.. i)
                end
            end
            parent=parent[i]
        end
    end
    return parent
end

function ForEach(parent,func)
    if type(parent)=='table' then
        for _,i in pairs(parent) do
            func(i)
        end
    else
        for _,i in pairs(parent:GetChildren()) do
            func(i)
        end
    end
end

function MakeValue(class,name,value,parent)
    local temp = Instance.new(class)
    temp.Name = name
    temp.Value = value
    temp.Parent = parent
    return temp
end 

function TweenProperty(obj, propName, inita, enda, length,sentinel)
    local startTime = tick()
    local mySentinel = sentinel.Value
    local diff = enda-inita
    while tick()-startTime<length and mySentinel==sentinel.Value do
        obj[propName] = (((tick()-startTime)/length)*diff)+inita
        wait(1/30)
    end
    obj[propName] = enda    
end

--[[Constants]]--

--[[Workspace Variables]]--
local Tool = script.Parent
local Handle = WaitForChild(Tool,'Handle')
local LazerSound = WaitForChild(Handle,'Lazer')
--[[Script Variables]]--

--[[Script Functions]]--

function CastLightRay(startPos,endPos,color,segLength,segSpeed,parts,effectfunc)
    local part, nend = game.Workspace:FindPartOnRay( Ray.new(startPos,(endPos-startPos).unit*999.999),Tool.Parent)
    if nend then endPos = nend end

    if part and part.Parent then
        if part.Parent:FindFirstChild('Humanoid') and part.Parent ~=Tool.Parent then
            effectfunc(part.Parent.Humanoid,(endPos-startPos).unit)
        elseif part.Parent.Parent and part.Parent.Parent:FindFirstChild('Humanoid')  and part.Parent.Parent~=Tool.Parent then
            effectfunc(part.Parent.Parent.Humanoid,(endPos-startPos).unit)
        end
    end 


    local numSegments = math.floor(math.min((startPos-endPos).magnitude/segLength,50))
    local initNumParts = #parts
    for i=numSegments,initNumParts,1 do
        if parts[i] then
            parts[i]:Destroy()
            parts[i]=nil
        end
    end
    for i=1,numSegments,1 do
        if not parts[i] then
            parts[i] = Instance.new('Part')
            parts[i].Parent = Tool
            parts[i].Anchored = true
            parts[i].FormFactor = 'Custom'
            parts[i].Size = Vector3.new(0,0,segLength)
            parts[i].CanCollide = false
            local tlight = Instance.new('PointLight')
            tlight.Name = 'Light'
            tlight.Parent = parts[i]

        end
        parts[i].BrickColor = color
        parts[i]:WaitForChild('Light').Color = color.Color
        parts[i].Light.Range =((math.sin(tick()*3)+1)*1)+5
        parts[i].Light.Brightness =((math.sin(tick()*3)+1)*1)+1

        parts[i].CFrame = CFrame.new(((i-.4)*(endPos-startPos).unit*segLength)+startPos,endPos)

    end

    return parts
end

--[[Running Logic]]--
local equipped = false
local rayparts = {}
local ColorChoices = {BrickColor.new('Toothpaste')}
local StartOffset = {Vector3.new(-.45,0,0),Vector3.new(0,0,0),Vector3.new(.45,0,0)}
local oldC0 =nil
local nweld
local EffectFunctions = 
{   function(hum,dir) 
        if hum.Torso then
            local nforce = Instance.new('BodyForce')
            nforce.force = dir*3000
            nforce.Parent = hum.Torso
            hum.Sit = true
            game.Debris:AddItem(nforce,.2)
            Delay(.2,function() hum.Sit = false end)
        end
    end
}
Tool.Equipped:connect(function(mouse)
    --game.Players.LocalPlayer:GetMouse()
    Spawn(function()
        local colorChoice = 1
        if not Tool.Parent:FindFirstChild('Torso') or not Tool.Parent.Torso:FindFirstChild('Right Shoulder') or not Tool.Parent:FindFirstChild('Humanoid') then return end
        LazerSound:Play()
        nweld = Tool.Parent.Torso['Right Shoulder']
        oldC0 = nweld.C0
        nweld.CurrentAngle = 0
        nweld.DesiredAngle = 0
        nweld.MaxVelocity = 0
        mouse.Button1Down:connect(function()
            colorChoice=colorChoice+1
            if colorChoice>#ColorChoices then colorChoice =1 end
            LazerSound.Pitch = .75+((colorChoice*.25)*3)
        end)
        equipped = true
        while equipped and Tool.Parent:FindFirstChild('Torso') do
            local tframe = Tool.Parent.Torso.CFrame
            tframe = tframe + tframe:vectorToWorldSpace(Vector3.new(1, 0.5, 0))
            local taim = mouse.Hit.p -( tframe.p )
            nweld.C0 = (CFrame.new(Vector3.new(),tframe:vectorToObjectSpace(taim))*CFrame.Angles(0,math.pi/2,0))+Vector3.new( 1, 0.5, 0 )
            rayparts = CastLightRay(Handle.CFrame.p+Handle.CFrame:vectorToWorldSpace(StartOffset[colorChoice]),mouse.Hit.p,ColorChoices[colorChoice], 5, .2,rayparts, EffectFunctions[colorChoice])
            LazerSound.Volume = ((math.sin(tick()*3)+1)*.25)+.25
            wait()
        end
        nweld.C0 =oldC0
        LazerSound:Stop()
    end)
end)

Tool.Unequipped:connect(function(mouse)
    equipped= false
    LazerSound:Stop()
    for i=1,50,1 do
        if rayparts[i] then
            rayparts[i]:Destroy()
            rayparts[i]=nil     
        end
    end
    if nweld then
        nweld.MaxVelocity =.15
        nweld.C0 =oldC0
    end

end)

I am looking forward for a solution or merely an advice.

Thank you.