Create race bib numbers

Do you have any programming experience?

This is relatively basic, but without some cursory knowledge of programming logic it probably just looks like gibberish.

I'll go through line by line and talk about what's happening.

function incrementBib()  //this is a container function just to keep variables local
{  
    var docRef = app.activeDocument;  //the currently active document
    var layers = docRef.layers;  //an array of all the layers in the document
  
    //min and max variables below can be used in order to create separate files in   
    //case there are an exorbitant amount of bib numbers needed. For example:  
    //if you need 10,000 bibs, you would end up with 10,000 sublayers in your document  
    //which could cause issues. So perhaps you wanted to split the file into 10 files  
    //with 1000 bibs each, you could enter 6001 as the minimum and 7000 as the max. Then  
    //save your file and re-open the template and run the script again with min=7001 and max=8000  
    //etc.  
  
    //var min indicates the lowest number bib that should be created
    var min = 1; //change this value to the lowest number you want  
    
    //var max indicates the highest number
    var max = 10; //change this value to the highest  
  
    //the script will generate one sublayer and one text frame for each integer in between min and max
  
    var main = layers["Main Bib"];  //this is saying "go to the layers array, and get me the layer called 'Main Bib'"
                                    //'Main Bib' can be any text you like. Just make sure there's a layer with the corresponding name.
    
    var tmp = main.layers["Bib Number"]; //this is a temporary sublayer and will be removed at the end of execution  
                                         //this line means "inside the layer 'Main Bib', (var main), give me the layer called 'Bib Number', 
    
    var tmpTxt = tmp.textFrames[0];  //this line says "inside the layer 'Bib Number' (var tmp), find me the first instance of a textFrame" (zero based index, so zero means 1).
                                     //You can also find a text frame by name, just like in the layers examples above.
    
    for(var b=max;b>min-1;b--)  // this loop executes once for each bib number you need. the difference between min and max
    {  
        var thisBib = main.layers.add();  // Here we are adding a new layer to the 'main' layer.
    
        thisBib.name = "Bib Number " + b;  //Here we are setting the name of this layer to the string "Bib Number " 
                                           //and then appending the variable "b" which is an integer between min and max.
    
        var thisNum = tmpTxt.duplicate(thisBib);  //this line duplicates the text frame from the 'tmp' layer and sends it to the new layer we created, (var thisBib);
    
        thisNum.contents = b;  //Here, we change the contents of the textFrame to the current number in the sequence, represented by 'b'.
  
    }  
    tmp.remove();  //Lastly, remove the tmp layer so that you are left only with the correct bib number layers.
}  
incrementBib();   //call the container function incrementBib() to begin execution