functions.js

function happyFace(x, y) {
  // head
  ellipse(x, y, 100, 100);
  
  // eyes
  ellipse(x-20, y-25, 20, 20);
  ellipse(x+20, y-25, 20, 20);

  // nose
  line(x, y-20, x-10, y);
  line(x-10, y, x, y+5);
  
  // smile
  arc(x, y+20, 40, 10, 0, PI)
}

happyFace(width/2, height/2);