"create a script that allows an entity to move through a 3 x 6 grid ahen the arrow keys are pressed"

-- local script 
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoidRootPart = character:WaitForChild("HumanoidRootPart")

local gridSize = Vector3.new(3, 0, 6)
local moveSpeed = 0.5

local function move(direction)
    local newPosition = humanoidRootPart.Position + (gridSize * direction)
    humanoidRootPart:MoveTo(newPosition)
end

local function onKeyPress(actionName, userInputState, inputObject)
    if userInputState == Enum.UserInputState.Begin then
        if actionName == "MoveUp" then
            move(Vector3.new(0, 0, -1))
        elseif actionName == "MoveDown" then
            move(Vector3.new(0, 0, 1))
        elseif actionName == "MoveLeft" then
            move(Vector3.new(-1, 0, 0))
        elseif actionName == "MoveRight" then
            move(Vector3.new(1, 0, 0))
        end
    end
end

local contextActionService = game:GetService("ContextActionService")
contextActionService:BindAction("MoveUp", onKeyPress, false, Enum.KeyCode.W, Enum.KeyCode.Up)
contextActionService:BindAction("MoveDown", onKeyPress, false, Enum.KeyCode.S, Enum.KeyCode.Down)
contextActionService:BindAction("MoveLeft", onKeyPress, false, Enum.KeyCode.A, Enum.KeyCode.Left)
contextActionService:BindAction("MoveRight", onKeyPress, false, Enum.KeyCode.D, Enum.KeyCode.Right)