Hi koogy,

 

I just start learning processing and I don't know much about it and everything I am trying to do is by the use of this forum and tutorials. This is what I have so far:

 

void setup () {
  size (300,300);
  smooth();
}

void draw() {
  fill(0,255,0);
  rect(0,0,100,100);
  fill(0,0,0);
  text("1",50,50);
 
  fill(255,255,0);
  rect(100,0,100,100);
  fill(0,0,0);
  text("2",150,50);
 
  fill(0,255,0);
  rect(200,0,100,100);
  fill(0,0,0);
  text("3", 250,50);
 
  fill(255,255,0);
  rect(0,100,100,100);
  fill(0,0,0);
  text("4",50,150);
 
  fill(0,255,0);
  rect(100,100,100,100);
  fill(0,0,0);
  text("5",150,150);
 
  fill(255,255,0);
  rect(200,100,100,100);
  fill(0,0,0);
  text("6", 250,150);
 
  fill(0,255,0);
  rect(0,200,100,100);
  fill(0,0,0);
  text("7", 50,250);
 
  fill(255,255,0);
  rect(100,200,100,100);
  fill(0,0,0);
  text("8",150,250);
 
  fill(0,255,0);
  rect(200,200,100,100);
  fill(0,0,0);
  text("9", 250,250);
}

 

 

I manage to get the squares in the proper colours and fill the numbers in there but I just can not adjust the proper size and font and I am also struggling with the part where I need to make it change the numbers. I think I need to use mousePressed but no matter what I've tried I also get some errors.