testd

local plr = game.Players.LocalPlayer
local cha = plr.Character
local start = CFrame.new(0, 10, 0)
local en = CFrame.new(0, 11, 0)
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local part = Instance.new("Model", workspace)

local part1 =Instance.new("Part",part)
part1.Size = Vector3.new(5, 1, 5)
part1.Anchored = true
part1.CFrame = start
part1.BrickColor = BrickColor.new("Bright green")

local part2 = Instance.new("Part", part)
part2.Size = Vector3.new(5, 1, 1)
part2.Anchored = true
part2.CFrame = start * CFrame.new(0, 1, 0) * CFrame.Angles(0, math.rad(90), 0)
part2.BrickColor = BrickColor.new("Bright red")

part.PrimaryPart = part1

while true do
	part:SetPrimaryPartCFrame(part:GetPrimaryPartCFrame(start * en * CFrame.new(0, 1, 0)))
end