int xspacing = 8;   // How far apart should each horizontal location be spaced
  int w;              // Width of entire wave
  
  float yoff = 0.0f;        // 2nd dimension of perlin noise
  float[] yvalues;          // Using an array to store height values for the wave (not entirely necessary)
  
  void setup() {
    size(200,200);
    frameRate(30);
    colorMode(RGB,255,255,255,100);
    smooth();
    w = width+16;
    yvalues = new float[w/xspacing];
  }
  
  void draw() {
    background(0);
    calcWave();
    renderWave();
  
  }
  
  void calcWave() {
    float dx = 0.05f;
    float dy = 0.01f;
    float amplitude = 100.0f;
  
    // Increment y ('time')
    yoff += dy;
  
    //float xoff = 0.0;  // Option #1
    float xoff = yoff; // Option #2
  
    for (int i = 0; i < yvalues.length; i++) {
      // Using 2D noise function
      //yvalues[i] = (2*noise(xoff,yoff)-1)*amplitude; // Option #1
      // Using 1D noise function
      yvalues[i] = (2*noise(xoff)-1)*amplitude;    // Option #2
      xoff+=dx;
    }
  
  }
  
  void renderWave() {
    // A simple way to draw the wave with an ellipse at each location
    for (int x = 0; x < yvalues.length; x++) {
      noStroke();
      fill(255,50);
      ellipseMode(CENTER);
      ellipse(x*xspacing,width/2+yvalues[x],16,16);
    }
  }