Shape Primitives

/**
 * Shape Primitives. 
 * 
 * The basic shape primitive functions are triangle(),
 * rect(), quad(), ellipse(), and arc(). Squares are made
 * with rect() and circles are made with ellipse(). Each 
 * of these functions requires a number of parameters to 
 * determine the shape's position and size. 
 */

size(640, 360);
background(0);
noStroke();

fill(204);
triangle(18, 18, 18, 360, 81, 360);

fill(102);
rect(81, 81, 63, 63);

fill(204);
quad(189, 18, 216, 18, 216, 360, 144, 360);

fill(255);
ellipse(252, 144, 72, 72);

fill(204);
triangle(288, 18, 351, 360, 288, 360); 

fill(255);
arc(479, 300, 280, 280, PI, TWO_PI);