ive made a countdown for a game but i am having trouble finding where to place it.

i start the game with a start button and then i want the countdown to begin 3 2 1 (as i have created) then after the 3 2 1 the game should start. but thats the function im having trouble with.

thank you if anyone can point me in the right direction :)

(countdown code below)




int sec=0;
 
void setup(){
  size(320,600);
  smooth();
}
 
void draw(){
  background(0);
 
  sec=second();
  for(int lop=0;lop<5;lop++){
    if(sec>10)sec=second()-(10*lop);
 
  }
 
 
  ////seconds////
  if(sec==3){
    rect(240,80,48,160);
    rect(240,288,48,160);
  }
  if(sec==2){
    rect(80,32,160,48);
    rect(80,240,160,48);
    rect(32,288,48,160);
    rect(80,448,160,48);
    rect(240,80,48,160);
  }
  if(sec==1){
    rect(80,32,160,48);
    rect(80,240,160,48);
    rect(80,448,160,48);
    rect(240,80,48,160);
    rect(240,288,48,160);

 
 
 
  }
}