JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

JavaScript

var days = [80];
var max = 5;
var min = -5;

for(var i=1;i<365;i++){
 	var difference = Math.floor(Math.random() * (max - min + 1)) + min;
    days[i] = days[i-1] + difference;
}

alert(days);