if(localStorage.getItem("theme") == "light") {
darkBtn.classList.remove("dark-btn-on");
document.body.classList.remove("dark-theme");
}
else if(localStorage.getItem("theme") == "dark") {
darkBtn.classList.add("dark-btn-on");
document.body.classList.add("dark-theme");
}
else{
localStorage.setItem("theme", "light");
}