What's the bug? Tests are ok but still showing remove bugs

Question

function main() {
var depth = parseInt(readLine(), 10);
//your code goes here
var day = 0;

while(1){
depth -= 7;
day += 1;
if(depth<=5){
day +=1;
console.log(day);
break;
}
depth +=2;
}
}

Answer 1

Think ! Think you are close
But why you written while(1)
Put an expression

Answer 2

Not working

Answer 3

var day = 0;
var slipping = 0;
while(slipping<depth){
day = day + 1;
slipping = slipping + 7;
if(slipping >= depth){
console.log(day);
break;
}
slipping = slipping - 2;
}