<script src=" 
    let $content = $('.content');
    let initNumber = 0;    
    for(let i=0; i<30; i++){        
        let lefts = (Math.floor(Math.random*5+2));        
        initNumber += lefts;        
        let $div = $('<div/>').addClass('yudi').css({            
            "left": `${initNumber}%`,            
            "top": `${lefts}%`        
        });        
        $content.append($div);    
    }
</script>

请问问题出在了哪呢？我跟着老师写的啊?