Notes

function mouseEvent(type, sx, sy, cx, cy) {
var evt;
var e = {
bubbles: true,
cancelable: (type != "mousemove"),
view: window,
detail: 0,
screenX: sx,
screenY: sy,
clientX: cx,
clientY: cy,
ctrlKey: false,
altKey: false,
shiftKey: false,
metaKey: false,
button: 0,
relatedTarget: undefined
};
if (typeof( document.createEvent ) == "function") {
evt = document.createEvent("MouseEvents");
evt.initMouseEvent(type,
e.bubbles, e.cancelable, e.view, e.detail,
e.screenX, e.screenY, e.clientX, e.clientY,
e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
e.button, document.body.parentNode);
} else if (document.createEventObject) {
evt = document.createEventObject();
for (prop in e) {
evt[prop] = e[prop];
}
evt.button = { 0:1, 1:4, 2:2 }[evt.button] || evt.button;
}
return evt;
}
var a = document.getElementsByClassName("spinner")[0],
b = document.getElementById("speed");
a.addEventListener("mousemove", function(e){console.log("clientX:" + e.clientX +", clientY:" + e.clientY +", screenX:" + e.screenX +", screenY:" + e.screenY +", movementX:" + e.movementX);});

function bootRot(x, y){
a.dispatchEvent(mouseEvent("mousemove", x, y, x, y));
}

function bootStart(){
if ((b.innerHTML != "Dragging") && parseInt(b.innerHTML) < 1600){
var xInicial = 0, yInicial = 0;

// "parseInt(b.innerHTML) < 1600": 1600 is the minimum value in RPMs from which the spinner rotates again.
// This value can be edited!

for(var ofParent = a; ofParent; ofParent = ofParent.offsetParent){
xInicial += ofParent.offsetLeft;
yInicial += ofParent.offsetTop;
}

var bootWidth = xInicial + a.offsetWidth,
bootHeight = xInicial + a.offsetHeight;

var Xs = [xInicial, (bootWidth)/2, bootHeight, (bootWidth)/2], /*[462, 591, 729, 869],*/
Ys = [(bootHeight)/2, yInicial, (bootHeight)/2, bootHeight], /*[77, 77, 77, 77],*/
count = 0, speedBoot = 20;

// speedBoot = 20: Time in milliseconds that the mouse pointer would by points (Xs,Ys) forming a perfect circle.
// This value can also be edited.

a.dispatchEvent(mouseEvent("mousedown", Xs[0], Ys[0], Xs[0], Ys[0]));

bootRot(Xs[0], Ys[0]);

setTimeout(function(){
bootRot(Xs[1], Ys[1]);
}, (count++)*speedBoot);

setTimeout(function(){
bootRot(Xs[2], Ys[2]);
}, (count++)*speedBoot);

setTimeout(function(){
bootRot(Xs[3], Ys[3]);
a.dispatchEvent(mouseEvent("mouseup", Xs[3], Ys[3], Xs[3], Ys[3]));
}, (count++)*speedBoot);
}
}

var bootIntervalId = setInterval(bootStart, 1800);

// bootStart, 20: Time in milliseconds to swing reset after reaching the minimum RPM value.
// This value can also be edited.
// It is recommended that greater values for computers that do not have advanced hardware configuration!

function bootStop(){ // bootStop(): Command stops the execution of the script.
clearInterval(bootIntervalId);
}