Display step instructions for specific model

var labelId = "label-1";
 
 $scope.$on('newStep', function(evt,arg ) {

 $scope.setWidgetProp( labelId, "text", arg); // get the currentStep from the arg
})

I am using the above code for displaying instructions of a model. Now I am also using switch case to select the required pvi file. I have a play button which is binded with 4 different models. All 4 models should play their respective animations but only the instructions of the first model should be displayed.