Tweening

Tweening is used to change properties of parts with it changing instantly, and will change to the arguments you choose. Example provided below.

local TweenService = game:GetService("TweenService")

local info = TweenInfo.new(
1: Easing Time (In Seconds)
2: Enum.EasingStyle.(PickyourStyle)
3: Enum.EasingDirection.(In or Out)
4: Repeat Times: (In Numbers)
5: Reverse (bool)
6: Delay (Time before it does the tween)
)

local End = 
{
    (change property here)
    Example:
    Position = Vector3.new(15,15,15); -- END WITH SEMICOLON!!!
}

local MainTween = TweenService:Create(Tween Object, Info Name, Ending Var Name) --Make The Tween

MainTween:Play() -- PLAY THE TWEEN

https://developer.roblox.com/en-us/api-reference/enum/EasingStyledeveloper.roblox.com

All Easing Styles.

If you want to Tween Models then:

1. Choose a root part

2. Weld all other parts to the root part

3. Make every part unanchored except root part

4. Tween root part

For GUI Tweening, follow the format below.