local Player = game.Players.LocalPlayer
local Character = Player.Character
local Block = Instance.new("Part")
Block.BrickColor = BrickColor.new("Dark green")
Block.Parent = game.Workspace
Block.Anchored = true
Block.CanCollide = true
Block.Size = Vector3.new(4, 0, 4)
local m = Player:GetMouse()
m.KeyDown:Connect(function(k)
	k = k:lower()
	if k == "f" then
		Block.Size = Block.Size + Vector3.new(1, 0, 1)
	end
end)

while true do
	Block.Position = Character.Torso.Position - Vector3.new(0, 2, 0)
	wait(1)
	Block.Position = Character.Torso.Position - Vector3.new(0, 3, 0)
	wait(-0.1)
end