So I am trying to create a set of two vectors that I can click and drag the head or tail of either one and have it move and cause the other to move as well. I can get both to move, or both to be dependent, but I can't get them to both move and be dependent.
Below is my code, I also attached the file. Any help or pointers would be appreciated.

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DynamicModule[ {a1, b1, a2, b2}, Manipulate[  a1 = {pt[[1, 1]], pt[[1, 2]]};  b1 = {pt[[2, 1]], pt[[2, 2]]};  a2 = {-pt[[1, 1]], -pt[[1, 2]]};  b2 = {-pt[[2, 1]], -pt[[2, 2]]};  Deploy@Graphics[    {     Arrowheads,     {AbsoluteThickness[3], pink[0.5], Arrow[{a1, b1}]},     {AbsoluteThickness[3], pink[0.5], Arrow[{a2, b2}]},     {Line[3 {{0, -1}, {0, 1}}], Line[3 {{-1, 0}, {1, 0}}]},     },    PlotRange -> 4    ],  {{pt, {{0.2, 0.3}, {0.8, 2.2}}}, Locator, Appearance -> None},  AppearanceElements -> "ResetButton",  SaveDefinitions -> True  ] ]