defines a value in the  setInterval ()  method so that 
 x-= 1; 
 secondLength = 60;
 setInterval(function(){
     console.log(secondLength);
     secondLength -= 1;
     setDefault(secondtx,secondLength)
    },1000); looks like this. It is correct in the first run. The value of  secondLength  decreases by 1 per second, and decreases by 2 per second on the second run. For some reason, the specific program is a little long, which I used when writing a countdown. 
 Codepen code:  https://codepen.io/GoodNetize.
 turn to the bosses. This is a cripple, because I can"t seem to write it, and I don"t know how to write it next. It is written after the effect of this clock. 
 imitate this:  https://codepen.io/Khatybov/p.
