Roblox Studio Moving Platform Script

-- Positions can be obtained by going into the properties of the parent part
-- Position 1 - This is your initial position
local position1 = Vector3.new(36,7.5,8)
-- Position 2 - This is your goal position
local position2 = Vector3.new(36,16,8)

-- This variable modulates between 0 and 1
local factor = 0

-- These variables keep track of the part we're moving and the service we'll be getting for running our function
local this = script.Parent
local RunService = game:GetService("RunService")

-- This function moves the platform
function movePlatform (time, step)
    -- This is the code for calculating the factor. This is a sine function that modulates between 0 and 1.
    factor = 0.5 * math.sin(time) + 0.5

    -- This is a lerp function. Lerp interpolates between two positions by the factor given (0 is the initial, 1 is the goal).
    local finalPosition = position1:Lerp(position2, factor)

    -- This sets the part's position to our newly-created position
    this.CFrame = CFrame.new(finalPosition)
end

-- This connects our function to the RunService so that our function can run every frame.
RunService.Stepped:Connect(movePlatform)