kineticjs - How do I create a button that loops through all the line variables making one visible at a time? -


how create button loops through line variables making 1 visible @ time?

i'm using kinetic javascript, want make button loops through line variables , every time click button turns next lines visiblity "true" , previous lines visibilty "false"

here code far: http://jsfiddle.net/nxt2l/4/

    <body>   <div id="container"></div>     <div id="buttons">       <button id="show">         show       </button>       <button id="hide">         hide       </button>       <button id="reroute">         reroute       </button>     </div>     <div id="container"></div>     <script src="kineticjs.js"></script>     <script>       var stage = new kinetic.stage({         container: 'container',         width: 1700,         height: 1100       });      //creates our layer put on stage     //note have building map layer , simply--     //--put these muiltiple layers ontop of each other.       var layer = new kinetic.layer();          <!--room 202-->       var line202n = new kinetic.shape({         drawfunc: function(canvas) {           var context = canvas.getcontext();           context.beginpath();           context.moveto(454, 338);           context.lineto(440, 351);           context.lineto(533, 449);           context.lineto(565, 449);           context.lineto(635, 449);           context.lineto(635, 368);           context.lineto(591, 368);           context.lineto(591, 289);           canvas.fillstroke(this);         },         stroke: 'blue',         strokewidth: 6,         visible: false       });       layer.add(line202n);        var line202s = new kinetic.shape({         drawfunc: function(canvas) {           var context = canvas.getcontext();           context.beginpath();           context.moveto(454, 338);           context.lineto(440, 351);           context.lineto(533, 449);           context.lineto(565, 449);           context.lineto(635, 449);           context.lineto(1432, 449);           context.lineto(1432, 532);           canvas.fillstroke(this);         },         stroke: 'blue',         strokewidth: 6,         visible: false       });       layer.add(line202s);         //add layer stage       stage.add(layer);        // add button event bindings         document.getelementbyid('show').addeventlistener('click',          function() {           line202n.show();           layer.draw();         }, false);          document.getelementbyid('hide').addeventlistener('click', function() {           line202n.hide();           layer.draw();         }, false);          document.getelementbyid('reroute').addeventlistener('click', function() {           line202n.hide();           layer.draw();         }, false);        </script>   </body>


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