Moving Model with SetPrimaryCFrame?

So I am moving a model left + right with setprimarypartcframe, but how would I move it back to where it started?

How I'm moving it:

local function _left()
    for i = 0,1,.001 do  
        goalie:SetPrimaryPartCFrame(goalie:GetPrimaryPartCFrame() * CFrame.new(-i,0,0))
        wait()
        if (goalie.Stick.Position - bound.Boundary2.Position).magnitude <= x then
            return
        end
    end
end

local function _right()
    for i = 0,1,.001 do   
        goalie:SetPrimaryPartCFrame(goalie:GetPrimaryPartCFrame() * CFrame.new(i,0,0))
        wait()
        if (goalie.Stick.Position - bound.Boundary3.Position).magnitude <= x then
            return
        end
    end
end