See more: https://processing.org/reference/modulo.html

Modulo example.pde

// Modulo Example
// Steve Lambert March 2, 2017 
// v0.2


// initializing variables
int interval; // how often changes
int xPos;
int yPos;
int circleW = 10;

void setup() {
  size(300,300);
  smooth();
  noStroke();
  background(255);

} // end setup


void draw() {
  ellipseMode(TOP);

// top circle
  if (interval % 96 == 0)  {
    fill(0);
    ellipse(xPos,yPos,circleW,circleW);
    }

// 2nd circle
  if (interval % 48 == 0)  {
    fill(51);
    ellipse(xPos,yPos+(circleW*1),circleW,circleW);
    }

// 3rd circle
  if (interval % 24 == 0)  {
    fill(102);
    ellipse(xPos,yPos+(circleW*2),circleW,circleW);
    }

// 4th circle
  if (interval % 12 == 0)  {
    fill(153);
    ellipse(xPos,yPos+(circleW*3),circleW,circleW);
    }

// 5th circle
  if (interval % 6 == 0)  {
    fill(204);
    ellipse(xPos,yPos+(circleW*4),circleW,circleW);
    }


  interval = interval+ 1; // count each loop!
  println("interval: "+interval);

  xPos++; // increment xPos
  println("xPos: "+xPos);
  if (xPos >= width){ // if it gets to the edge, move down 1 row
    xPos = 0;
    yPos = yPos + (circleW * 5);
  }

  if (yPos >= height){ // if it gets to the bottom, start at the top again
    yPos = 0;
    background(255ou);
  }
} // end draw