Fly script

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local Fly = Instance.new("BodyForce")
local Torso = Player.Character:FindFirstChild("HumanoidRootPart")

Fly.force = Vector3.new(0, 0, 0)
Fly.Parent = Torso

local function start()
    local vel = Instance.new("BodyVelocity")
    vel.velocity = Vector3.new(0, 50, 0)
    vel.maxForce = Vector3.new(math.huge, math.huge, math.huge)
    vel.Parent = Torso
    repeat wait()
        if not Player.Character or not Player.Character:FindFirstChild("HumanoidRootPart") then break end
        Fly.force = Vector3.new(0, 7500, 0)
        Torso.CFrame = Torso.CFrame * CFrame.new(0, 0, -1)
    until not Fly or not Torso or not Player.Character or not Player.Character:FindFirstChild("HumanoidRootPart")
end

local function stop()
    Fly.force = Vector3.new(0, 0, 0)
    Torso.Velocity = Vector3.new(0, 0, 0)
end

Mouse.KeyDown:connect(function(key)
    if key == "f" then
        start()
    elseif key == "x" then
        stop()
    end
end)