function setup() {
  createCanvas(200, 200);
}

function draw() {
  background(220);

  // Line:  https://p5js.org/reference/#/p5/line
  line(5, 5, 30, 30);

  // Point:  https://p5js.org/reference/#/p5/point
  point(40, 15);
  point(50, 15);
  point(60, 15);

  // Rectangle:  https://p5js.org/reference/#/p5/rect
  rect(70, 5, 40, 20);

  // Ellipse:  https://p5js.org/reference/#/p5/ellipse
  ellipse(60, 60, 25, 60);
  ellipse(100, 60, 25); // an ellipse with width only is a circle

  // Triangle:  https://p5js.org/reference/#/p5/triangle
  triangle(100, 80, 75, 150, 150, 125);

  // Quad:  https://p5js.org/reference/#/p5/quad
  quad(10, 160, 145, 170, 179, 190, 20, 195);
}