Making my Maze Generator Script align the parts

Help and Feedback Scripting Support
#1

so my maze generator script make the position / size of the parts a bit weird and idk why can someone help me please?
i have added my script and images for help

My script:

local ignoreinstance = script.Parent
local TS = game:GetService("TweenService")
local Info = TweenInfo.new(0.5,Enum.EasingStyle.Linear,Enum.EasingDirection.Out,0,false,0)
local Part = script.Parent
local db = false
local TotalParts = #game.Workspace.Parts:GetChildren()
local CurrentParts = 0
function IsEven(num)
	return num % 2 == 0
end
for i=5,1,-1 do
	print("Starting In "..i)
	wait(1)
end
print("Maze Generation Started")

local Finished = false
repeat
	Elapsed = tick()
	wait()
until Elapsed ~= nil

local Pos = {
	Vector3.new(0,0,-15),
	Vector3.new(-15,0,0),
	Vector3.new(0,0,15),
	Vector3.new(15,0,0)
}

local OldPositions = {}


while not Finished do
	for i=1,4 do
		script.Parent.Orientation = Vector3.new(0,i*90,0)
		local ray = Ray.new(script.Parent.Position,Pos[i])
		local part, position = workspace:FindPartOnRay(ray,ignoreinstance,false,true)
		if part then
			if not db then
				db = true
				if part.Name == "MazePart" and math.random(1,2) == 1 then
					repeat
						StartTick = math.round(tick())
					wait()	
					until StartTick ~= nil
					local PrevPartPosition = script.Parent.Position
					script.Parent.Position = part.Position
					local Distance = math.round((part.Position - PrevPartPosition).Magnitude)
					local DistancePart = Instance.new("Part",game.Workspace)
					DistancePart.Material = Enum.Material.SmoothPlastic
					DistancePart.CanCollide = false
					DistancePart.Anchored = true
					local Orientation = Part.Orientation.Y
					DistancePart.Orientation = Vector3.new(0,Orientation,0)
					DistancePart.Size = Vector3.new(14,1,6)
					if not IsEven(Distance) then
						Distance = Distance +1
					end -- Below this is where i set my parts position
					if Orientation == -90 then
						DistancePart.Position = PrevPartPosition+Vector3.new(1,0,(Distance/2))
					elseif Orientation == 90 then
						DistancePart.Position = PrevPartPosition-Vector3.new(-1,0,(Distance/2))	
					elseif Orientation == -180 then
						DistancePart.Position = PrevPartPosition-Vector3.new((Distance/2),0,-1)		
					elseif Orientation == 0 then
						DistancePart.Position = PrevPartPosition+Vector3.new((Distance/2),0,1)
					end
					DistancePart.Position = Vector3.new(math.round(DistancePart.Position.X),DistancePart.Position,math.round(DistancePart.Position.Z))
					CurrentParts = CurrentParts + 1
					PrevPartPosition = part.Position
					table.insert(OldPositions,#OldPositions+1,part.Position)
					part:Destroy()
				end
				if StartTick then
					if math.round(tick() - StartTick) > 0.5 and CurrentParts < TotalParts then
						print("No Parts Found")
						script.Parent.Position = OldPositions[#OldPositions]
						table.remove(OldPositions,#OldPositions)
						StartTick = math.round(tick())
					elseif CurrentParts == TotalParts and not Finished then
						Finished = true
						print("Maze Was Finished In "..math.round(tick() - Elapsed).." Seconds")
					end
				end
				wait()
				db = false
			end
		end
		wait(0)
	end
end

What i have with this script:
image

What i want:
image