ElRom

const STATE_SELECT = 1;
const STATE_CHECK = 2;
var state = STATE_SELECT;

var rrr = function() {
  if(state === STATE_CHECK) return;
  $(this).toggleClass("red");
};
var ggg = function() {
  if(state === STATE_CHECK) return;
  $(this).toggleClass("green");
};
var yyy = function() {
  $(".green").toggleClass("yellow");
  if(state === STATE_CHECK) {
    state = STATE_SELECT;
  } else {
    state = STATE_CHECK;  
  }
};

$("div").hover(rrr);
$("div").click(ggg);
$("button").click(yyy);