I see below countdown function not work, but I do not know the execution order of this countdown. What is the execution order of this countdown function?
 function countdown() {
     let i;
     console.log("Countdown:");
     for(i=5; i>=0; i--) {
         setTimeout(function() {
             console.log(i===0 ? "Finish!" : i);
           }, (5-i)*1000)
         ;
     }
 }
 countdown();
