roblox CFrame loop

local brick = Instance.new("Part",workspace)
brick.CFrame = CFrame.new(Vector3.new(0,5,0,0))

while true do
    for i = 1,100 do
        wait()
		brick.CFrame = brick.CFrame + Vector3.new(0,0,1)
        --workspace.maBrickmodel:SetPrimaryPartCFrame(CFrame.new(workspace.maBrickmodel.PrimaryPart.Position + Vector3.new(0,0,1)))
print(i)
    end

    wait(.2)

    for i = 1,100 do
        wait()
		brick.CFrame = brick.CFrame - Vector3.new(0,0,1)

        --workspace.maBrickmodel:SetPrimaryPartCFrame(CFrame.new(workspace.maBrickmodel.PrimaryPart.Position - Vector3.new(0,0,1)))
print(i)
    end
    wait(.2)

end