Task - Switch zero's to the end of array

task_zero.js

list = [2,4,0,11,0,1,2,0,30,0];
count = 0;
tail = list.length - 1;
firstZero = -1;
while(count <= tail){
    if(list[count] == 0 && firstZero == -1){
        firstZero = count;
    }else if(list[count] != 0 && firstZero != -1 ){
        var b = list[count];
        list[count] = list[firstZero] ;
        list[firstZero] = b ;
        firstZero +=1;
    }
    count +=1;
}
/*
or
list.sort(function(a,b){return b-a});
*/
console.log(list);