void setup(){

size(400, 400);
background(0);
stroke(100,50,255);
strokeWeight(20);
smooth();
colorMode(HSB, 350);

}

int mrX = 0;
int mrY = 0;
int mrSize = 50;


void draw(){

background(0);
point(mrX, mrY);
mrX = mrX +1;
point(mrY, 200);
mrY = mrY + 1;
mrSize = mrSize +1;
strokeWeight(mrSize);
stroke(mrX,350,350);


if (mrX > 400){
   mrX = 0;
}

if (mrY > 400){
  mrY = 0;

}


if (mrSize > 20){
  mrSize = 1;
}
}