How to add +1 to variable every 10 seconds in Processing?

Question

Excuse my ignorance, but I ran into a problem that turned out to be challenging for my current knowledge in programming with Processing, even though the idea is quite simple

Answer 1

You could store the last number of seconds in a static (or global) variable, and only increment i when the current number of seconds is higher than the oldsecs

void draw() {
    static int oldsecs = 0;
    int secs = millis() / 1000;
    if (secs > oldsecs) {
        i++;
        oldsecs = secs;
    }
    ...

Assuming the language is C, and the int type is not overflowed by the number of seconds.