var time = 12000; //= 12sec
window.setTimeout(
\tfunction()
\t{
\t\twindow.location.reload() ;
\t},
\ttime
) ;

function rand(min, max){
return (max-min)*Math.random()+min;
}

function step() {
document.querySelector('#firebutton').click();
}
setTimeout (step, rand (5000, 7000));

(function() {
document.getElementById("walk").checked=true;
})();