int start;
int startVerticalLine = 20; //where the first vertical line is
int startHorizontalLine = 20;
int gridSpacing = 20; // how much the vertical lines are spaced

void setup() {
  start = millis(); // initialising the start

  size(600, 600);
  background(0);
  smooth();
  noStroke();

} // end setup



void draw() {
  //Timer
  int timer = millis()-start;
  textSize(20);
  text(timer, 10, 10);


  if (timer > 5000) {
     // grid();
  }
} // end draw







void grid() {
  background(255);
  while (startVerticalLine < width) {
    line(startVerticalLine, 0, startVerticalLine, height);
    startVerticalLine = startVerticalLine + gridSpacing;
  }

  //draw horizontal lines for grid
  while (startHorizontalLine < height) {
    line(0, startHorizontalLine, width, startHorizontalLine);
    startHorizontalLine = startHorizontalLine + gridSpacing;
  }
}