Check if the Value goes over the Limit (rebornPrice)
if jumpPower.Value >= rebornPrice.Value then
script.Parent.ProgressBar:TweenSize(UDim2.new(1, 0, 0, 28))
else
script.Parent.ProgressBar:TweenSize(UDim2.new(jumpPower.Value/rebornPrice.Value, 0, 0, 28))
end