Relógio

int raio;
int currentSeconds = 0;

class Ponto{
  int x;
  int y;

  Ponto(int x, int y){
    this.x = x;
    this.y = y;
  }
}

void setup(){
  size(500,500);
  raio = (width-100)/2 - 20;

}

void draw(){
  background(125);
  drawClock();
  movePointer();
}

Ponto polares(float angulo, int raio){
  return new Ponto(
            round(cos(angulo) * raio),
            round(sin(angulo) * raio)
         );
}

void drawClock(){
  strokeWeight(5);
  stroke(0);
  ellipse(width/2,height/2,width-100,width-100);

}

void movePointer(){
  if(millis()/1000.0 > currentSeconds+1){
    currentSeconds++;
  }

  Ponto p = polares((2*PI/60.0)*currentSeconds - PI/2,raio);

  strokeWeight(6);
  stroke(255,0,0);
  line(width/2,height/2, width/2 + p.x, height/2 + p.y);
}