"script for 2 sets of teleporters with the option to make them one-way. add detailed comments, explanation and instructions."

-- Script for teleporter A (TeleporterA) 
local teleporterA = script.Parent
local teleporterB = game.Workspace.TeleporterB
local teleporterC = game.Workspace.TeleporterC
local teleporterD = game.Workspace.TeleporterD

local oneWay = false -- Set to true for one-way teleportation

local function teleportAtoB(otherPart)
    local player = game.Players:FindFirstChild(otherPart.Parent.Name)
    if player then
        -- Teleport player from TeleporterA to TeleporterB
        player.Character.HumanoidRootPart.CFrame = teleporterB.CFrame + Vector3.new(0, 5, 0)
        if oneWay then return end
        wait(1) -- Prevents player from being teleported back immediately
    end
end

teleporterA.Touched:Connect(teleportAtoB)

-- Script for teleporter B (TeleporterB) 
local teleporterB = script.Parent

local function teleportBtoA(otherPart)
    local player = game.Players:FindFirstChild(otherPart.Parent.Name)
    if player and not oneWay then
        -- Teleport player from TeleporterB to TeleporterA
        player.Character.HumanoidRootPart.CFrame = teleporterA.CFrame + Vector3.new(0, 5, 0)
        wait(1) -- Prevents player from being teleported back immediately
    end
end

teleporterB.Touched:Connect(teleportBtoA)

-- Script for teleporter C (TeleporterC) 
local teleporterC = script.Parent

local function teleportCtoD(otherPart)
    local player = game.Players:FindFirstChild(otherPart.Parent.Name)
    if player then
        -- Teleport player from TeleporterC to TeleporterD
        player.Character.HumanoidRootPart.CFrame = teleporterD.CFrame + Vector3.new(0, 5, 0)
        if oneWay then return end
        wait(1) -- Prevents player from being teleported back immediately
    end
end

teleporterC.Touched:Connect(teleportCtoD)

-- Script for teleporter D (TeleporterD) 
local teleporterD = script.Parent

local function teleportDtoC(otherPart)
    local player = game.Players:FindFirstChild(otherPart.Parent.Name)
    if player and not oneWay then
        -- Teleport player from TeleporterD to TeleporterC
        player.Character.HumanoidRootPart.CFrame = teleporterC.CFrame + Vector3.new(0, 5, 0)
        wait(1) -- Prevents player from being teleported back immediately
    end
end

teleporterD.Touched:Connect(teleportDtoC)

-- Instructions:
1. Create 4 parts in the Workspace and name them TeleporterA, TeleporterB, TeleporterC, and TeleporterD.
2. Copy and paste each script into the corresponding teleporter part.
3. Set the 'oneWay' variable to true in the scripts if you want the teleporters to be one-way.
4. Test the teleporters in-game by walking on them.