How to make a cell add itself every month on a given date in Google Sheets?

Question

css

It is necessary to make it so that, for example, there is an amount of 1000 in the cell. And a month later, she added 1000 to herself. In total, to get 2000 in this cell. Is it possible to do this?
Help those in the know.

Answer 1

So take any slider with a preview.
You have an event - transition to the next slide.
And attach the logo change to the event.
Basically a simple problem.
It can be implemented on bxSlider, it has a callback.

Answer 2

Make a trigger that will take a value and add 1000 to it

function trigger(){
  const delta = +1000;
  let range = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Лист1").getRange("A1");
  let oldValue = range.getValue() || 0;
  range.setValue(delta+oldValue);
};