Example text from the book "Getting Started with Processing"

Robot1_Draw.pde

// Robot 1: Draw from "Getting Started with Processing" 
// by Reas & Fry. O'Reilly / Make 2010

size(720, 480);
smooth();
strokeWeight(2);
background(204);
ellipseMode(RADIUS);

// Neck
stroke(102);                // Set stroke to gray
line(266, 257, 266, 162);   // Left
line(276, 257, 276, 162);   // Middle
line(286, 257, 286, 162);   // Right

// Antennae
line(276, 155, 246, 112);   // Small
line(276, 155, 306, 56);    // Tall
line(276, 155, 342, 170);   // Medium

// Body
noStroke();                 // Disable stroke
fill(102);                  // Set fill to gray
ellipse(264, 377, 33, 33);  // Antigravity orb 
fill(0);                    // Set fill to black
rect(219, 257, 90, 120);    // Main body
fill(102);                  // Set fill to gray
rect(219, 274, 90, 6);      // Gray stripe

// Head
fill(0);                    // Set fill to black
ellipse(276, 155, 45, 45);  // Head
fill(255);                  // Set fill to white
ellipse(288, 150, 14, 14);  // Large eye
fill(0);                    // Set fill to black
ellipse(288, 150, 3, 3);    // Pupil
fill(153);                  // Set fill to light gray
ellipse(263, 148, 5, 5);    // Small eye 1
ellipse(296, 130, 4, 4);    // Small eye 2
ellipse(305, 162, 3, 3);    // Small eye 3