html 

js 
    main.js 

    draw.js 
        drawAllNode()
        drawNode()
    
    ly.js 
        ly_uz()
        ly_cell()
        ly()
    
    nm.js
        isValidFloat()
        node_byId()
        nm()
        generateUniqueId()
        
        addNode() 
        createNode() 
        updateNode()
        selectNode()
        removeNode() 
        

        load_ly()
        uploadFile
        downloadFile

        clearAllNodes

    parse_ly.js     //parse ly  
    prop_panel      //create prop_panel