html - Simple vanilla javascript game -


i trying make simple slot machine game first 1 here.

the 1 in example above bit complex, need mine add few classes here , there @ simple click events.

long story short, have play button initiates slot machine (shows - done), , when slot machine shown, spin button appears, , when click button, can make add 1 class first combination (e.g. "bonus") adds css class , respective transitions desired effect.

and comes tricky part me, need click same spin button again, add different class time. has work 3 times, while when pressing 4-th time, need add class id='ad-cont' div.

how can achieve vanilla js? know there must sort of loop here, can't figure out.

<div id="ad-cont">   <div id="slot-frame"><img class="frame" src="../frame.png">     <div class="frame-item"></div>     <div class="frame-item"></div>     <div class="frame-item"></div>     <div class="frame-item"></div>     <div class="frame-item"></div>   </div><a id="play" href="#">play</a><a id="spin" href="#">spin</a> </div>

and here i've got far:

var adcontainer = document.getelementbyid('ad-cont'); var playbtn = document.getelementbyid('play'); var spinbtn = document.getelementbyid('spin'); var slotmachine = document.getelementbyid('slot-frame');  playbtn.addeventlistener('click', function(){   adcontainer.classlist.add('playing'); });  spinbtn.addeventlistener('click', function(){   slotmachine.classlist.add('bonus'); });

thank all!

have tried using switch , count resets itself?

var count = 0; spinbtn.addeventlistener('click', function(){     count++;     switch(count) {         case 1:             slotmachine.classlist.add('bonus');             break;         case 2:             slotmachine.classlist.add('bonus2');             break;         case 3:             slotmachine.classlist.add('bonus3');             break;         case 4:             otheridelement.classlist.add('finished!');             count = 0;             break;         default:             alert("error!");     }  });

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