Property Link (returns event)

local function Link_Properties(Instance_1,Property_1,Instance_2,Property_2)
if not(Instance_1 and Instance_2 and Property_1 and Property_2)then return;end;
return Instance_1.Changed:Connect(function(a)if not a then return;end;
if a~=Property_1 then return;end;Instance_2[Property_2]=Instance_1[Property_1];end);end;