Pass Javascript data in iFrame to session or page

I have a “Wheel of Fortune” Javascript code running in an iFrame. How do I retain the data from this iFrame and pass it to the next page?

For reference here is my code for the wheel:

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Wheel of Fortune Bingo</title>
    
<!--
    
MIT License

Copyright (c) 2017 Jeremy Rue

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
-->
    
    <style type="text/css">
    body {
        overflow: hidden; /* Hide scrollbars */
     }
    text{
        font-family:Helvetica, Arial, sans-serif;
        font-size:12px;
        pointer-events:none;
        overflow-wrap: break-word;
    }
    #chart{
        position:absolute;
        width:500px;
        height:500px;
        top:0;
        left:0;
    }
    #question{
        position: absolute;
        width:300px;
        height:500px;
        top:0;
        left:525px;
        word-wrap: break-word;
    }
    #question h1{
        font-size: 20px;
        font-weight: bold;
        font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
        position: absolute;
        padding: 0;
        margin: 0;
        top:50%;
        -webkit-transform:translate(0,-50%);
                transform:translate(0,-50%);
    }
    </style>
    
</head>
<body>
    <div id="chart"></div>
    <div id="question"><h1></h1></div>
    
    <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
    <script type="text/javascript" charset="utf-8">
        var padding = {top:20, right:40, bottom:0, left:0},
            w = 500 - padding.left - padding.right,
            h = 500 - padding.top  - padding.bottom,
            r = Math.min(w, h)/2,
            rotation = 0,
            oldrotation = 0,
            picked = 100000,
            oldpick = [],
            color = d3.scale.category20();//category20c()
            //randomNumbers = getRandomNumbers();

        //http://osric.com/bingo-card-generator/?title=HTML+and+CSS+BINGO!&words=padding%2Cfont-family%2Ccolor%2Cfont-weight%2Cfont-size%2Cbackground-color%2Cnesting%2Cbottom%2Csans-serif%2Cperiod%2Cpound+sign%2C%EF%B9%A4body%EF%B9%A5%2C%EF%B9%A4ul%EF%B9%A5%2C%EF%B9%A4h1%EF%B9%A5%2Cmargin%2C%3C++%3E%2C{+}%2C%EF%B9%A4p%EF%B9%A5%2C%EF%B9%A4!DOCTYPE+html%EF%B9%A5%2C%EF%B9%A4head%EF%B9%A5%2Ccolon%2C%EF%B9%A4style%EF%B9%A5%2C.html%2CHTML%2CCSS%2CJavaScript%2Cborder&freespace=true&freespaceValue=Web+Design+Master&freespaceRandom=false&width=5&height=5&number=35#results

        var data = [
                    {"label":"WIN",  "value":1,  "question":"YOU WON"}, 
                    {"label":"LOSE",  "value":1,  "question":"U LOST :("},
                    {"label":"DRAW",  "value":1,  "question":"DRAW"}, 
                    {"label":"WIN",  "value":1,  "question":"YOU WON!"}, 
                    {"label":"LOSE",  "value":1,  "question":"U LOST"}, 
                    {"label":"WIN",  "value":1,  "question":"YOU WON!"}, 
                    {"label":"LOSE",  "value":1,  "question":"U LOST :("},
                    {"label":"DRAW",  "value":1,  "question":"DRAW"}, 
                    {"label":"WIN",  "value":1,  "question":"YOU WON!"}, 
                    {"label":"LOSE",  "value":1,  "question":"U LOST :("},
                    {"label":"DRAW",  "value":1,  "question":"DRAW"},                     {"label":"LOSE",  "value":1,  "question":"U LOST :("},
                    {"label":"DRAW",  "value":1,  "question":"DRAW"}, 
                
        ];


        var svg = d3.select('#chart')
            .append("svg")
            .data([data])
            .attr("width",  w + padding.left + padding.right)
            .attr("height", h + padding.top + padding.bottom);

        var container = svg.append("g")
            .attr("class", "chartholder")
            .attr("transform", "translate(" + (w/2 + padding.left) + "," + (h/2 + padding.top) + ")");

        var vis = container
            .append("g");
            
        var pie = d3.layout.pie().sort(null).value(function(d){return 1;});

        // declare an arc generator function
        var arc = d3.svg.arc().outerRadius(r);

        // select paths, use arc generator to draw
        var arcs = vis.selectAll("g.slice")
            .data(pie)
            .enter()
            .append("g")
            .attr("class", "slice");
            

        arcs.append("path")
            .attr("fill", function(d, i){ return color(i); })
            .attr("d", function (d) { return arc(d); });

        // add the text
        arcs.append("text").attr("transform", function(d){
                d.innerRadius = 0;
                d.outerRadius = r;
                d.angle = (d.startAngle + d.endAngle)/2;
                return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")translate(" + (d.outerRadius -10) +")";
            })
            .attr("text-anchor", "end")
            .text( function(d, i) {
                return data[i].label;
            });

        container.on("click", spin);


        function spin(d){
            
            container.on("click", null);

            //all slices have been seen, all done
            console.log("OldPick: " + oldpick.length, "Data length: " + data.length);
            if(oldpick.length == data.length){
                console.log("done");
                container.on("click", null);
                return;
            }

            var  ps       = 360/data.length,
                 pieslice = Math.round(1440/data.length),
                 rng      = Math.floor((Math.random() * 1440) + 360);
                
            rotation = (Math.round(rng / ps) * ps);
            
            picked = Math.round(data.length - (rotation % 360)/ps);
            picked = picked >= data.length ? (picked % data.length) : picked;


            if(oldpick.indexOf(picked) !== -1){
                d3.select(this).call(spin);
                return;
            } else {
                oldpick.push(picked);
            }

            rotation += 90 - Math.round(ps/2);

            vis.transition()
                .duration(3000)
                .attrTween("transform", rotTween)
                .each("end", function(){

                    //mark question as seen
                    d3.select(".slice:nth-child(" + (picked + 1) + ") path")
                        .attr("fill", "#111");

                    //populate question
                    d3.select("#question h1")
                        .text(data[picked].question);

                    oldrotation = rotation;
                
                    container.on("click", spin);
                });
        }

        //make arrow
        svg.append("g")
            .attr("transform", "translate(" + (w + padding.left + padding.right) + "," + ((h/2)+padding.top) + ")")
            .append("path")
            .attr("d", "M-" + (r*.15) + ",0L0," + (r*.05) + "L0,-" + (r*.05) + "Z")
            .style({"fill":"black"});

        //draw spin circle
        container.append("circle")
            .attr("cx", 0)
            .attr("cy", 0)
            .attr("r", 60)
            .style({"fill":"white","cursor":"pointer"});

        //spin text
        container.append("text")
            .attr("x", 0)
            .attr("y", 15)
            .attr("text-anchor", "middle")
            .text("SPIN")
            .style({"font-weight":"bold", "font-size":"30px"});
        
        
        function rotTween(to) {
          var i = d3.interpolate(oldrotation % 360, rotation);
          return function(t) {
            return "rotate(" + i(t) + ")";
          };
        }
        
        
        function getRandomNumbers(){
            var array = new Uint16Array(1000);
            var scale = d3.scale.linear().range([360, 1440]).domain([0, 100000]);

            if(window.hasOwnProperty("crypto") && typeof window.crypto.getRandomValues === "function"){
                window.crypto.getRandomValues(array);
                console.log("works");
            } else {
                //no support for crypto, get crappy random numbers
                for(var i=0; i < 1000; i++){
                    array[i] = Math.floor(Math.random() * 100000) + 1;
                }
            }

            return array;
        }

    </script>
</body>
</html>

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