(() => {
function Quiz (){

	hazure1 = document.getElementById("1"),
	hazure2 = document.getElementById("2"),
	hazure3 = document.getElementById("3"),
	hazure4 = document.getElementById("4"),
	atari = document.getElementById("dobon");
	function quiz (){
	
		dobon.addEventListener("click", answer, false);
	         1.addEventListener("click", answer_f1, false);
		2.addEventListener("click", answer_f2, false);
    3.addEventListener("click", answer_f3, false);
		4.addEventListener("click", answer_f4, false);
	}
	function answer (){
		dobon.innerHTML = "correct!!!";
	}
	function answer_f1 (){
		1.innerHTML = "Error...";
	}
	function answer_f2 (){
		2.innerHTML = "Error...";
	}
	function answer_f3 (){
		3.innerHTML = "Error...";
	}
	function answer_f4 (){
		4.innerHTML = "Error...";
	}
	info.addEventListener("click", quiz, false);
}