An automatic machine includes N output units, a storage unit and a control unit. The control unit is electrically connected to the output units and the storage unit. The storage unit stores a first reaction pattern corresponding to a first command. The first reaction pattern includes a header and N reaction modes and each of the reaction modes is corresponding to one of the output units. Each of the reaction modes includes M reaction frames. The header records a number of the reaction frames of each reaction mode. The control unit receives the first command, looks the first reaction pattern up in the storage unit according to the first command, and selectively controls at least one of the output units to perform the reaction frames correspondingly according to the header and the reaction modes.