roblox get player pos in plyr scripts

workspace.Model.PrimaryPart = workspace.Model.prim

while true do
	for i = 1, 50 do
		wait()
		workspace.Model:SetPrimaryPartCFrame(CFrame.new(workspace.Model.PrimaryPart.Position +Vector3.new(1,0,0)))
	end
		for i = 1, 50 do
		wait()
		workspace.Model:SetPrimaryPartCFrame(CFrame.new(workspace.Model.PrimaryPart.Position +Vector3.new(-1,0,0)))

end

end