> [!CAUTION]
> knowledge needed: tables, variables, services, RBXScriptSignals, etc

# TweenService
Tweenservice is used to smoothly transition properties of a instance, for example you could change a parts transparency from 0 -> 1 over the course of 4 seconds.

## Creating Tweens
To create a tween you need to get the `TweenService` object and use the `:Create()` method.

local TweenService = game:GetService("TweenService")
local Tween = TweenService:Create(Instance, TweenInfo, PropertyTable)

### TweenInfo
TweenInfo is a set of parameters for your tween that will tell it things like how long its supposed to take, if its gonna reverse or repeat, etc

To create a TweenInfo you can use `TweenInfo.new()`

**TweenInfo API**

local Info = TweenInfo.new(
    time: number?, 
    easingStyle: Enum.EasingStyle?, 
    easingDirection: Enum.EasingDirection?,
    repeatCount: number?,
    reverses: boolean?,
    delayTime: number?
)

### PropertyTable
A tweens PropertyTable is just a table that represents what the tween is supposed to be changing.

local PropertyTable = {
    Transparency = 1,
    Size = Vector3.new(10,10,10)
}

### Created Tween Example

local TweenService = game:GetService("TweenService")

local Part = Instance.new("Part")
Part.Parent = workspace

local Info = TweenInfo.new(
    2, -- time
    Enum.EasingStyle.Sine,
    Enum.EasingDirection.InOut,
    0, -- repeat count
    true, -- reverses
    0 -- delay
)

local PropertyTable = {
    Transparency = 1,
    Size = Vector3.new(10,10,10)
}

local Tween = TweenService:Create(Part, Info, PropertyTable)

## Working With Created Tweens

### Methods
Tweens have 3 different methods you can use on them, Most are pretty self explanatory on what they do.
- :Play()<br>
- :Pause()<br>
- :Cancel()<br>

### Events
Tweens have different events that will fire upon certain things happening in the tweens playback. at the current time there is only 1 event.

- .Completed<br>
Fires upon the tween finishing its playback.

## Finished Product

local TweenService = game:GetService("TweenService")

local Part = Instance.new("Part")
Part.Parent = workspace

local Info = TweenInfo.new(
    2, -- time
    Enum.EasingStyle.Sine,
    Enum.EasingDirection.InOut,
    0, -- repeat count
    true, -- reverses
    0 -- delay
)

local PropertyTable = {
    Transparency = 1,
    Size = Vector3.new(10,10,10)
}

local Tween = TweenService:Create(Part, Info, PropertyTable)

Tween.Completed:Connect(function()
    print("Tween Completed")
end)

Tween:Play()