[Solved by Me]How do I make a build script with a Plot?

I made this build script, but it won't work and i am not getting any errors, what suppose to happen is 1.wait until the GUI is pressed 2.Make a clone of the model 3.Make the clone follow the mouse 4.test if the player wants to place the object in the plot 5.makes another clone and place it where the player wants to put it

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local ReinforcedIronWall = game.Workspace.BluePrintWalls.ReinforcedIronWall

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local function round (n)
	return math.floor(n + 0.5)
end

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local uis = game:GetService("UserInputService")
      uis.InputBegan:Connect(function(a,b)
	
	if not b 
		
	then if a.KeyCode == Enum.KeyCode.R then
		   ReinforcedIronWall:SetPrimaryPartCFrame(ReinforcedIronWall.PrimaryPart.CFrame * CFrame.Angles(0,math.rad(90),0))
		end
	end
end)

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script.Parent.MouseButton1Click:Connect(function()
	local CloneReinforcedIronWall = ReinforcedIronWall:Clone()
		  CloneReinforcedIronWall.Parent = game.Workspace.ClonedObjects
		  CloneReinforcedIronWall.Name = "ClonedReinforcedIronWall"
	local ClonedReinforcedIronwall = game.Workspace.ClonedObjects.ClonedReinforcedIronWall
	mouse.TargetFilter = game.Workspace.ClonedObjects:WaitForChild("ClonedReinforcedIronWall")
	mouse.Move:Connect(function()
	CloneReinforcedIronWall:SetPrimaryPartCFrame(CFrame.new(round(mouse.Hit.Position.X),round(mouse.Hit.Position.Y),round(mouse.Hit.Position.Z)) + Vector3.new(0,5,0))
	
	mouse.Button1Down:Connect(function()
		
	local ObjectX = CloneReinforcedIronWall.Primarypart.Position.X
	local ObjectX = CloneReinforcedIronWall.Primarypart.Position.X
	local ObjectY = CloneReinforcedIronWall.Primarypart.Position.Y
	local ObjectY = CloneReinforcedIronWall.Primarypart.Position.Y
	local ObjectZ = CloneReinforcedIronWall.Primarypart.Position.Z
	local ObjectZ = CloneReinforcedIronWall.Primarypart.Position.Z
if 
    ObjectX < game.Workspace.Plot.Position.X - 150 == true and 
	ObjectX > game.Workspace.Plot.Position.X + 150 == true and
	ObjectY > game.Workspace.Plot.Position.Y == true and
	ObjectY < game.Workspace.Plot.Position.Y + 1500 == true and 
	ObjectZ < game.Workspace.Plot.Position.Z + 150 == true and
	ObjectZ > game.Workspace.Plot.Position.Z + 150 == true 
then
	local BluePrint = game.Workspace.ClonedObjects.ClonedReinforcedIronWall.Primarypart.Position
	local PlacingObject = game.Workspace.Walls.ReinforcedIronWall:Clone()
		  PlacingObject:SetPrimaryPartCFrame(CFrame.new(BluePrint))
	      PlacingObject.Parent = game.Workspace.PlacedObjects
	
			end
		end)
	end)
end)	

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please help, i don't understand why it wont work because i can't make it to work.Thank you in advance

i made the build script now, i'm just working on the collision part so what i done is when the part is not on top of the plot i just set an anchor Position so its anchor to that position until the mouse.hit .position is equal to the top of the plot and i added offset so all parts of the model is above the part

this script works for models it also makes a semi transparent blueprint, it also has destroy mode so it would destroy the model it works by pressing right click and pressing left click on the model and right click again to go back to build mode, and just click to build, it has changeable grid too. This script is not done yet, i'm making it so scroll wheel goes through the build selection and more stuff

local Player = game.Players.LocalPlayer
local char = Player.Character or Player.CharacterAdded:Wait()
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local Mouse = Player:GetMouse()
local Gridsize = 1
local Model = game.Workspace.Conveyor
local ModelPrimaryPart = Model.PrimaryPart

local Plot = game.Workspace.Plots.Plot
local HalfSizeforX = Plot.Size.X/2
local HalfSizeforZ = Plot.Size.Z/2
local Heightlimit = 100

local PosX
local PosY
local PosZ

local AngleY = math.rad(0)
local RotationState = 1

local ModelCloneBluePrint = Model:Clone()
ModelCloneBluePrint.Parent = game.Workspace
ModelCloneBluePrint.Name = ModelCloneBluePrint.Name.."BluePrint"
local ModelCloneBluePrintChildren = ModelCloneBluePrint:GetDescendants()
for index,value in pairs(ModelCloneBluePrintChildren) do
	if not value:IsA("Model")
	then
		value.Transparency = 0.5
		value.CanCollide = false
		if value.Name == "PrimaryPart" or value.Name == "TouchDeny"
		then value.Transparency = 1	
		end	
	end
end

UserInputService.InputBegan:Connect(function(key)
	if key.KeyCode == Enum.KeyCode.R then
		RotationState = RotationState + 1
		AngleY = AngleY + math.rad(45)
		if AngleY == math.rad(360) then
			AngleY = math.rad(0)
			RotationState = 1
		end
	end
end)

local DestroyMode = false
RunService.RenderStepped:Connect(function()
	if DestroyMode == false
	then
		Mouse.TargetFilter = ModelCloneBluePrint
		
		PosX  = math.floor(Mouse.Hit.X / Gridsize + 0.5) * Gridsize
		PosY  = math.floor(Mouse.Hit.Y / Gridsize + 0.5) * Gridsize
		PosZ  = math.floor(Mouse.Hit.Z / Gridsize + 0.5) * Gridsize
			
		local ModelXOffset = ModelPrimaryPart.Size.X/2
		local ModelYOffset = ModelPrimaryPart.Size.Y/2
		local ModelZOffset = ModelPrimaryPart.Size.Z/2
			
		if RotationState == 1 or RotationState == 3 then
			HalfSizeforX = Plot.Size.X/2 - ModelXOffset
			HalfSizeforZ = Plot.Size.Z/2 - ModelZOffset
		elseif RotationState == 2 or RotationState == 4 then
			HalfSizeforX = Plot.Size.X/2 - ModelZOffset
			HalfSizeforZ = Plot.Size.Z/2 - ModelXOffset
		end	
			
		local BorderPosX = Plot.Position.X + HalfSizeforX
		local BorderNegX = Plot.Position.X - HalfSizeforX
		local BorderCelY = Plot.Position.Y + Heightlimit
		local BorderFlrY = Plot.Position.Y
		local BorderPosZ = Plot.Position.Z + HalfSizeforZ
		local BorderNegZ = Plot.Position.Z - HalfSizeforZ
			
		if PosX > BorderPosX then
			PosX = BorderPosX
			PosY = BorderFlrY 
		elseif PosX < BorderNegX then
			PosX = BorderNegX
			PosY = BorderFlrY 
		end
	
		if PosZ > BorderPosZ then
			PosZ = BorderPosZ
			PosY = BorderFlrY 
		elseif PosZ < BorderNegZ then
			PosZ = BorderNegZ
			PosY = BorderFlrY 
		end
		local ModelPrimaryPart = ModelCloneBluePrint.PrimaryPart
		local ModelPoint1 = ModelPrimaryPart.Size/2 + ModelPrimaryPart.Position
		local ModelPoint2 = ModelPrimaryPart.Size/2 - ModelPrimaryPart.Position
		local ModelRegion = Region3.new(ModelPoint1,ModelPoint2)
		local Obstacle = workspace:FindPartsInRegion3WithIgnoreList(ModelRegion,char,math.huge)
		for i,v in pairs(Obstacle) do
			local Obstacles = v.Parent
			local ObstaclePrimaryPart = v.PrimaryPart
			local ObstacleSize
		end
		
		PosY = PosY + ModelYOffset
		ModelCloneBluePrint:SetPrimaryPartCFrame(CFrame.new(PosX,PosY,PosZ) * CFrame.Angles(0,AngleY,0))
	else
		ModelCloneBluePrint:SetPrimaryPartCFrame(CFrame.new(0,10000,0))
	end
end)

Mouse.Button1Down:Connect(function()
	if DestroyMode == false
	then
		local Clone = Model:Clone()
		Clone.Parent = game.Workspace.PlacedObject
		Clone.Name = Model.Name .."Clone"
		Clone:SetPrimaryPartCFrame(CFrame.new(ModelCloneBluePrint.PrimaryPart.Position) * CFrame.Angles(0,AngleY,0))
		local TouchDenySize = Clone.TouchDeny.Size
		local TouchDenySizeX = TouchDenySize.X + ModelPrimaryPart.Size.X
		local TouchDenySizeY = TouchDenySize.Y
		local TouchDenySizeZ = TouchDenySize.Z + ModelPrimaryPart.Size.Z
		Clone.TouchDeny.Size = Vector3.new(TouchDenySizeX,TouchDenySizeY,TouchDenySizeZ)
	elseif Mouse.Target.Parent.Parent == game.Workspace.PlacedObject 
	then Mouse.Target.Parent:Destroy()
	end
end)

Mouse.Button2Down:Connect(function()
	DestroyMode = not DestroyMode
end)