do 
    function createWrap() 
        return coroutine.wrap(function(x) 
                                    print("Hello", x); 
                                    coroutine.yield(); 
                                    print("continue") 
                                end); 
    end 
 
    coA = createWrap(); --get the function, resum the coroutine 
    coA(3); 
    coA(3); --call the global function, , resum the coroutine 
 
end