Slither.io auto play bot

    // ==UserScript==
    // @name Slither.io auto play bot
    // @include     http://slither.io/
    // @author      I HAVE A REALLY LONG NICK NAME
    // @description auto play bot for slither.io
    // @namespace    http://tampermonkey.net/
    // @version      0.1
    // @match        *://Slither.io/*
    // ==/UserScript==

    var el = document.getElementsByTagName('iframe');

    for (var i = 0; i < el.length; i++) {
        var currentEl = el[i];
        currentEl.remove();
    }

    document.getElementById('logo').remove();
    document.getElementById('tips').remove();
    document.getElementById('fb').remove();
    document.getElementById('twth').remove();


    if (window.top != window.self)

    REALSCORE = 10;
    REALDNA = [1,1,1,1,1,1,1,1,1,1,1,1];

    BESTRANK = 1000;
    BESTSCORE = 1;

    printbot = function() {
    	console.log("Dumping bot data:\nREALDNA = " + JSON.stringify(REALDNA) + ";\nREALSCORE = " + REALSCORE + ";\nBESTRANK = " + BESTRANK + ";\nBESTSCORE = " + BESTSCORE + ";");
    }

    savedna = function() {
    	if(typeof(Storage) !== "undefined") {
    		localStorage["REALSCORE"] = REALSCORE;
    		localStorage["REALDNA"] = JSON.stringify(REALDNA);
    		localStorage["BESTRANK"] = BESTRANK;
    		localStorage["BESTSCORE"] = BESTSCORE;
    	}
    }

    cleardna = function() {
    	localStorage.removeItem("REALSCORE");
    	localStorage.removeItem("REALDNA");

    	localStorage.removeItem("BESTRANK");
    	localStorage.removeItem("BESTSCORE");

    	REALSCORE = 30;
    	BESTRANK = 1000;

    	var distavoid = 90;
    	var preykerroin = 5;
    	var viholliskerroin = 544;
    	var vaarakerroin = 200;
    	var chargedistance = 500;
    	var pakoondistance = 70;
    	var keskikerroin = 2.0;
    	var keskihakukerroin = 0.1;

    	REALDNA = [distavoid,preykerroin,viholliskerroin,vaarakerroin,chargedistance,pakoondistance,keskikerroin,keskihakukerroin];

    	TESTDNA = REALDNA.slice();
    	TESTSCORE = REALSCORE;

    	testingdna = 1;
    	DNA = REALDNA.slice();

    	savedna();
    }

    if(typeof(Storage) !== "undefined") {
        // Code for localStorage/sessionStorage.

    	if (!localStorage.REALSCORE || !localStorage.REALDNA || !localStorage.BESTRANK || !localStorage.BESTSCORE) {
    		cleardna();
    	}
    	else
    	{
    		REALSCORE = localStorage["REALSCORE"]*1;
    		REALDNA = JSON.parse(localStorage["REALDNA"]);
    		BESTRANK = localStorage["BESTRANK"]*1;
    		BESTSCORE = localStorage["BESTSCORE"]*1;
    	}
    } else {
        // Sorry! No Web Storage support..
    }


    TESTDNA = REALDNA.slice();
    TESTSCORE = REALSCORE;

    testingdna = 1;
    DNA = REALDNA.slice();

    var injected_dead = true;

    var lastscore = 0;
    var bestscore = 0;

    var lastrank = 0;
    var bestrank = 1000;
    var uhka = false;


    var ruokakerroin = 1/40;
    var ruokapower = 1;
    var vihollispower = 2;
    var vaarapower = 2;
    var preypower = 1;
    var keskipower = 1;


    var preychase = true;

    var learnrate = 0.3;
    var	precision = 100;



    INJECTED = function() {
    	var kerroin = 10000;
    	if (animating) {
    		if (snake) {
    			accelerate = false;
    			injected_dead = false;

    			//xm = grd-snake.xx;
    			//ym = grd-snake.yy;

    			xt = 0;
    			yt = 0;

    			mindist = grd;


    			for (var i = 0; i < preys.length; i++) {
    				xtd = (preys[i].xx-snake.xx);
    				ytd = (preys[i].yy-snake.yy);

    				dist = Math.sqrt(xtd*xtd + ytd*ytd);

    				xt += xtd/Math.pow(dist,preypower+1)*DNA[1];
    				yt += ytd/Math.pow(dist,preypower+1)*DNA[1];

    				if (dist < DNA[4] && preychase)
    				{
    					accelerate = true;
    				}
    			}

    			uhka = false;
    			for (var i = 0; i < snakes.length; i++) {
    				//alert(myStringArray[i]);

    				target = snakes[i];

    				if (snake.id!=target.id)
    				{
    					xtd = (target.xx-snake.xx);
    					ytd = (target.yy-snake.yy);

    					dist = Math.sqrt(xtd*xtd + ytd*ytd)-DNA[0];
    					dist = Math.max(1, dist);

    					xt += -xtd/Math.pow(dist,vihollispower+1)*DNA[2];
    					yt += -ytd/Math.pow(dist,vihollispower+1)*DNA[2];



    					if (dist < DNA[5])
    					{
    						accelerate = true;
    					}

    					if (dist<mindist)
    					{
    						uhka = target;
    						mindist = dist;
    						/*if (mindist<300)
    						{
    							accelerate = true;
    						}*/
    					}

    					parts = target.pts;
    					for (var k = 0; k < parts.length; k++)
    					{
    						part = parts[k];

    						xtd = (part.xx-snake.xx);
    						ytd = (part.yy-snake.yy);

    						dist = Math.sqrt(xtd*xtd + ytd*ytd)-DNA[0];
    						dist = Math.max(1, dist);

    						xt += -xtd/Math.pow(dist,vaarapower+1)*DNA[3];
    						yt += -ytd/Math.pow(dist,vaarapower+1)*DNA[3];
    					}

    				}
    			}


    			if (!(preychase && preys.length>0))
    			{
    				for (var i = 0; i < foods_c; i++) {
    					//alert(myStringArray[i]);

    					xtd = (foods[i].xx-snake.xx);
    					ytd = (foods[i].yy-snake.yy);

    					dist = Math.sqrt(xtd*xtd + ytd*ytd);

    					//xt += Math.pow(ruokakerroin*foods[i].fw,2)*xtd/Math.pow(dist,ruokapower+1);
    					//yt += Math.pow(ruokakerroin*foods[i].fw,2)*ytd/Math.pow(dist,ruokapower+1);
    					xt += Math.pow(foods[i].gr,2)*xtd/Math.pow(dist,ruokapower+1);
    					yt += Math.pow(foods[i].gr,2)*ytd/Math.pow(dist,ruokapower+1);
    				}

    				xtd = (grd-snake.xx);
    				ytd = (grd-snake.yy);

    				dist = Math.sqrt(xtd*xtd + ytd*ytd);

    				xt += xtd/Math.pow(grd-dist,keskipower+1)*DNA[6];
    				yt += ytd/Math.pow(grd-dist,keskipower+1)*DNA[6];

    				xt += xtd/grd*DNA[7];
    				yt += ytd/grd*DNA[7];


    			}

    			xm = xt*kerroin;
    			ym = yt*kerroin;

    			lsxm = -xm;
    			lsym = -ym;

    			if (accelerate)
    			{
    				setAcceleration(1);
    			}
    			else
    			{
    				setAcceleration(0);
    			}

    			//console.log("xx:" +  view_xx + "yy:" + view_yy);
    			//console.log("snake.xx:" +  snake.xx + "snake.yy:" + snake.yy);
    			//console.log("snake.fx:" +  snake.fx + "snake.fy:" + snake.fy);
    			//console.log("fvx:" +  fvx + "fvy:" + fvy);
    			//console.log("");

    			//console.log("foods_c:" + foods_c);
    			//console.log("snakes.length:" + snakes.length);

    			//console.log("D:" + Math.sqrt(xm*xm + ym*ym));

    			lastscore = Math.floor(150 * (fpsls[snake.sct] + snake.fam / fmlts[snake.sct] - 1) - 50) / 10;
    			if (!lastscore)
    			{
    				lastscore = 1;
    			}
    			lastrank = rank;
    			if (!lastrank)
    			{
    				lastrank = 500;
    			}
    		}
    		else
    		{
    			if (!injected_dead)
    			{
    				injected_dead = true;

    				if (lastscore>bestscore)
    				{
    					console.log("Last score: " + lastscore + "(new best)");
    					bestscore = lastscore;

    					BESTSCORE = bestscore;
    				}
    				else
    				{
    					console.log("Last score: " + lastscore + " Best: " + bestscore);
    				}

    				if (lastrank<bestrank)
    				{
    					console.log("Last rank: " + lastrank + "(new best)");
    					bestrank = lastrank;

    					BESTRANK = bestrank;
    				}
    				else
    				{
    					console.log("Last rank: " + lastrank + " Best: " + bestrank);
    				}

    				if (testingdna>0)
    				{
    					TESTSCORE = lastscore/(lastrank+1);

    				}
    				else
    				{
    					REALSCORE = (REALSCORE+lastscore/lastrank)/2;
    				}
    				lastscore = 0;

    				for (var key in DNA)
    				{
    					if (TESTSCORE > REALSCORE)
    					{
    						var mul = TESTSCORE/REALSCORE
    						REALDNA[key] = (REALDNA[key] + TESTDNA[key]*mul)/(1+mul);
    						REALDNA[key] = Math.round(REALDNA[key]*precision)/precision;
    					}

    					if (testingdna<0)
    					{
    						TESTDNA[key] = REALDNA[key] + REALDNA[key]*(Math.random() - Math.random())*learnrate;
    						TESTDNA[key] = Math.round(TESTDNA[key]*precision)/precision;
    					}
    				}

    				savedna();

    				testingdna = -testingdna;

    				if (testingdna>0)
    				{
    					DNA = TESTDNA.slice();
    				}
    				else
    				{
    					DNA = REALDNA.slice();
    				}
    				//console.log("DNA = [" + DNA + "];");

    				setTimeout(connect, 3000);
    				//console.log("Reconnecting");
    			}
    		}
    	}
    }

    var injectbot = function() {
    	if (typeof(redraw) != "undefined")
    	{
    		oldredraw = redraw;

    		redraw = function() {
    			INJECTED();
    			oldredraw();
    		}
    		console.log("injected")
    		window.onmousemove = null;
    	}
    	else
    	{
    		setTimeout(injectbot, 1000);
    		console.log("retrying")
    	}
    }
    injectbot();