int x = 0;
int y = 0;
int s = 0;
void setup()
{
background(122,122,122);
size(700,700);  
}

void draw()
{

background(122,122,122);
fill(255,255,0);
rect(width/2+x,height/2,25,25);
rect(width/2-x,height/2,25,25);
rect(width/2,height/2-y,25,25);
rect(width/2,height/2+y,25,25);
x++;
y++;

}