Hi,
In the code below, i would like to see, a white square,changing in red square after 500ms, changing in green square after 500 ms, changing in white square... and so on.
Instead of that only a green square ?
I don't understand what is wrong in my code ?
Could somebody help me, please, thanx.

Oliver.

1. void setup(){
     size(200,200);
     rectMode(CENTER);
   }
   
   void draw(){
   fill(color(255,255,255));
   rect(width/2,width/2, width/4,width/4);
   delay(500);
   fill(color(255,0,0));
   rect(width/2,width/2, width/4,width/4);
   delay(500);
   fill(color(0,255,0));
   rect(width/2,width/2, width/4,width/4);
   delay(500);
   }