Chapter 3: Example 3-4: Drawing a Continuous Line

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// Example 3-4: Drawing a continuous line
void setup() {
  size(200, 200);
  background(255);
  smooth();
}

void draw() {
  stroke(0);
  // Draw a line from previous mouse location to current mouse location.
  line(pmouseX, pmouseY, mouseX, mouseY);
}