Mlg

plr = game.Players.LocalPlayer
if not plr then
    return
end
mouse = plr:GetMouse()
function xpress(key)
    if key == "x" then
        plr.Character.Humanoid.WalkSpeed = 100
        decal = Instance.new("Decal",workspace.Base)
        decal.Texture = "rbxassetid://256465742"
        decal.Face = "Top"
        b = Instance.new("Sound",workspace)
        b.SoundId = "rbxassetid://279457492"
        b:Play()
        x = Instance.new("ParticleEmitter",plr.Character.Torso)
        x.Texture = "rbxassetid://256465742"
    end
end
function ypress(key)
    if key == "y" then
        plr.Character.Humanoid.WalkSpeed = 16
        decal:remove()
        b:Stop()
        x:remove()
    end
end
mouse.KeyDown:connect(xpress)
mouse.KeyDown:connect(ypress)