// Sketch to illustrate the differences 
// between random() and noise()
//
// First run the sketch as is to show the randomness
// in the lines that result. Adjust the loop increment to i += 2
// to see better.
//
// Next comment the line(0 with random() and
// uncomment the lines that use noise()
// run it a few times.
//
// Next, vary the delta: make it 0.0 or 0.5 to get more randomness
// Make delta very small, 0.005 to get more natural contours

float t;
float delta;

void setup() {
  size(500, 500);
  smooth();
  background(255);
  noLoop();
  
  // set up noise parameters
  t = 0;
  delta = 0.1;
} // setup()

void draw() {
  stroke(52, 5, 5);
  for (int i=0; i<width; i++) {
//    line(i, height, i, height - random(1)*height/2);
    line(i, height, i, height - noise(t)*height/2);
    t += delta;
  }
} // draw()