How to convert R6 tool to a r15 tool ?

Hope this helps. Please Accept if this helps!

local enabled = true
Player = script.Parent.Parent.Parent
Mouse = Player:GetMouse()
run = game:GetService("RunService")
function onActivated()
    if script.Parent.Active then
if not enabled then return end
enabled = false
game:GetService("Chat"):Chat(Player.Character.Head, "Water Style: Water Shark Bomb Jutsu!")
local RightShoulder = Player.Character.RightUpperArm
     local LeftShoulder = Player.Character.LeftUpperArm
      local Run = game:GetService("RunService")
      for i = 1, 3 do
         for i = 1, 10 do
            LeftShoulder.C0 = LeftShoulder.C0 *CFrame.Angles(0, 0, -0.16)
            RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0.16)
            RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0.1, 0)
            LeftShoulder.C0 = LeftShoulder.C0 *CFrame.Angles(0, -0.1, 0)
            Run.Stepped:wait(0.01)
         end
         for i = 1, 10 do
            LeftShoulder.C0 = LeftShoulder.C0 *CFrame.Angles(0, 0.1, 0)
            LeftShoulder.C0 = LeftShoulder.C0 *CFrame.Angles(0, 0, 0.16)
            RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, -0.1, 0)
            RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, -0.16)
            Run.Stepped:wait(0.01)
         end
      end

local x = Instance.new("Part")
        x.BrickColor = BrickColor.new("Bright blue")
        x.Shape = "Ball" 
        x.Size = Vector3.new(1, 1, 1)
        x.Name = Player.Name
        x.TopSurface = "Smooth"
        x.BottomSurface = "Smooth"
        x.CanCollide = false
        fd = script.Firedamage:clone()
        fd.Parent = x
        x.Transparency = 0.7
        a = Instance.new("SpecialMesh", x)
        a.MeshId = "http://www.roblox.com/asset/?id=441221710"
        a.Parent = x
        a.Scale = Vector3.new(1, 1, 1)
        y = Instance.new("BodyVelocity")
        y.maxForce = Vector3.new(math.huge, math.huge, math.huge)
        y.velocity = Player.Character.UpperTorso.CFrame.lookVector*80
        x.Parent = game.Workspace
        y.Parent = x
        fd.Disabled = false
        x.CFrame = Player.Character.UpperTorso.CFrame*CFrame.new(0, 0, -12)
        game.Debris:AddItem(x, 6)
        p = Instance.new("ParticleEmitter")
    color1 = Color3.new(84, 161, 168)
    color2 = Color3.new(84, 161, 168)
    p.Color = ColorSequence.new(color1,color2)
    p.Texture = "rbxassetid://292289455"
    p.LightEmission = 0
    n1 = 10
    n2 = 10
    p.Size = NumberSequence.new(n1,n2)
    p.Lifetime = NumberRange.new(.6, .6)
    p.Rotation = NumberRange.new(0)
    p.RotSpeed = NumberRange.new(15)
    p.Rate = 500
    p.Speed = NumberRange.new(40)
    p.Parent = x
        wait(2)
enabled = true
script.Disabled = true
wait(33)
script.Disabled = false

end
    end

Mouse.Button1Down:connect(onActivated)