// var str = 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890~!@#$%^*()-_=+,./<>?;:\'"[]{}|`&';

var str = 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890';

var randChar = () => str.substr(Math.floor(Math.random() * str.length), 1)

// this one works better. I think maybe the random chars are being parsed to some degree so they don't fill the space??
var randStr = len => new Array(len)
	.fill('')
	.map(randChar)
	.join('');

var editor = atom.workspace.getActiveTextEditor();

var getNullLength = (line) => editor.getMaxScreenLineLength() - line.textContent.length;

var fillLine = line => {
	var noise = line.querySelector('.noise');
	if(noise) {
		noise.textContent = randStr(noise.textContent.length);
	} else {
		line.insertAdjacentHTML('beforeEnd', `<span class="noise">${randStr(getNullLength(line))}</span>`)
	}
};

var interval = setInterval(() => document.querySelectorAll('.line').forEach(fillLine), 20);