getafeel/objects/obj_enemy/Step_0.gml

/// @description go on

switch (state)
{
	// Init lifebar position at instance creation
    case 0:
        _bar_x = center_2width(x, sprite_width, _bar_w);
		_bar_y = y - 40;
		state = 1;
    break;

    case 1:
        //
    break;

    case 2:
        //
    break;

    default:
        //
    break;
}