//autohtml.opt.js
    
    module.exports = [
        ['v,r1,200px'],
        ['v,r2,100px'],
        ['v,r3,300px']
    ];

    //autohtml.opt.js
    
    module.exports = [
        ['h,c1,200px'],
        ['h,c2,100px'],
        ['h,c3,300px'],
        ['h,c4,100px'],
        ['h,c5,50px']
    ];

    //autohtml.opt.js
    //f: fill
    
    module.exports = [
        ['h,c1,400px'],
        ['h,c2,f']
    ];

    //autohtml.opt.js
    //f: fill
    
    module.exports = [
        ['v,r1,300px'],
        ['v,r2,f']
    ];

    //autohtml.opt.js
    //f: fill
    
    module.exports = [
        ['v,r1,10%'],
        ['v,r2,20%'],
        ['v,r3,30%'],
        ['v,r4,40%'],
    ];

    //autohtml.opt.js
    //f: fill
    
    module.exports = [
        ['v,r1,300px', [
            ['h,c1,200px'],
            ['h,c2,100px'],
            ['h,c3,f'],
            ['h,c4,300px'],
        ]],
        ['v,r2,f']
    ];

    //autohtml.opt.js
    //f: fill
    
    module.exports = [
        ['v,r1,300px', [
            ['h,c1,200px'],
            ['h,c2,100px'],
            ['h,c3,f', [
                ['v,r1,20%'],
                ['v,r2,30%'],
                ['v,r3,50%'],
            ]],
            ['h,c4,300px'],
        ]],
        ['v,r2,f']
    ];

    //autohtml.opt.js
    //f: fill
    
    var layout = oneLayout(5, 10);

    function oneLayout(limit, maxOneLayer){
        if(limit == 0) return 0;
        var arr = [];
        var perc = [];
        var total = 0;
        for(var i = 0; i < Math.ceil(Math.random() * maxOneLayer); i  ){
            perc[i] = Math.ceil(Math.random() * 5);
            total  = perc[i];
        }
        perc = perc.map(function (val) {
            return val / total * 100;
        });
        var direction = trueOrFalse() ? 'v' : 'h';
        perc.forEach (function (val, i) {
            arr[i] = [direction   ','   'x'   i   ','   val   '%']
            if(trueOrFalse()){
                var onemore = oneLayout(limit - 1, maxOneLayer);
                if(onemore != 0) {
                    arr[i][1] = onemore;
                }
            }
        });
        return arr;
    }

    function trueOrFalse() {
        return Math.random() < 0.5 ? false : true
    }
    module.exports = layout;