[Solved] How to double jump to fly or smth? [closed]

So far i have this idk how to go further:

game.Players.LocalPlayer.CharacterAdded:Wait()
local Character = game.Players.LocalPlayer.Character

if Character.Humanoid.HumanoidState == Enum.HumanoidStateType.Jumping then
    local BP = Instance.new("BodyPosition")
    BP.Parent = Character.HumanoidRootPart
    game:GetService("UserInputService"):Connect(function(Input)
        if Input.KeyCode == Enum.KeyCode.W then
            BP.Position = 
        end
    end)
end

EDIT: I solved my self its now good funcitoning