Change countdown timer logic?

Question

JavaScript

Hello, I know js superficially and I want to change the timer logic for the sake of interest, of course I can take a new one, that's not the point.
Now its logic works from the time 0:00. But looking at the code, it seems to me that we take the current time and add 24 hours (1000 * 60 * 60 * 24) to target_time. I want to implement it this way in order to take the current time and add my own to it.
At least that way, then I'll procrastinate to remember in cookies so as not to update the timer for a person every time.
Yes, maybe a bike.

var set_slide = function(selector, slide) {
$(selector).text(slide);
}
var time = new Date();
var target_time = new Date(time.getFullYear(), time.getMonth(), time.getDate());
target_time = target_time.valueOf()+1000;
var tick = function(init) {
if (init == undefined) {
init = false;
}
var current_time = new Date();
current_time = current_time.valueOf();
if (current_time > target_time) {
var time = new Date();
target_time = new Date(time.getFullYear(), time.getMonth(), time.getDate());
target_time = target_time.valueOf()+1000*60*60*24;
}
var time_diff = Math.floor((target_time - current_time)/1000);
var second_2 = time_diff % 10; time_diff = Math.floor(time_diff/10);
var second_1 = time_diff % 6; time_diff = Math.floor(time_diff/6);
var minute_2 = time_diff % 10; time_diff = Math.floor(time_diff/10);
var minute_1 = time_diff % 6; time_diff = Math.floor(time_diff/6);
var hour_2 = Math.floor(time_diff/15);
var hour_1 = time_diff % 10;
set_slide('span.secondPlay5', second_2);
if ((second_2 == 9) || init) { set_slide('span.second6Play5', second_1);
if ((second_1 == 5) || init) {set_slide('span.minutePlay5', minute_2);
if ((minute_2 == 9) || init) { set_slide('span.minute6Play5', minute_1);
if ((minute_1 == 5) || init) {set_slide('span.hourPlay5', hour_1);
if ((hour_2 == 9) || init) {set_slide('span.hour2Play5', hour_2);}}}}}
}
tick(true);
setInterval(tick, 1000);

Answer 1

Let's do this: here's a fiddle for you, look what's wrong. The timer wrote from the beginning, I couldn’t figure out your code
jsfiddle.net/Ivanq/qnprhnLs