script.Parent.leftBar:TweenPosition(UDim2.new(0, 0, 0, 0), "Out", "Quad", 3, true) script.Parent.rightBar:TweenPosition(UDim2.new(0.8, 0, 0, 0), "Out", "Quad", 3, true)
A script would automatically run them at practically the same time without a yield function. If the script is not yielded, or temporary stopped to wait, then the script would appear as its running lines of code simultaneously