Counter script like 0.00000, how to do it when registering an account?

Question

PHP

Hello. I tried to make a counter after logging into the account.
For example, you logged into your account and see a counter of the format 0.00000, you need to make it so that when you add a certain amount, it increases by the specified number.
In general, for example, the counter works at a speed of +2 per second, when replenishing the balance, the condition is 1 rub = 0.00003
, that is, if you replenish in the amount of 1 ruble, the speed of the counter increases and it is already dialed not 0.00002 per second, but 0.00005 per second

Answer 1

There are examples here to start with to find a solution:
https://www.electrictoolbox.com/using-settimeout-j...
Here, in the first answer, more modern and simpler:
https://stackoverflow.com/questions /6893130/how-to...

Answer 2

https://jsfiddle.net/89tvu08L/13/
updateCount() must be called on replenishment. It's just a frontend. I suspect that this data will then be accepted, processed and stored somewhere - do not forget to properly check them at the entrance.