import processing.core.*; import java.applet.*; import java.awt.*; import java.awt.image.*; import java.awt.event.*; import java.io.*; import java.net.*; import java.text.*; import java.util.*; import java.util.zip.*; public class third_processing extends PApplet {int num = 2000;
int range = 4;

float[] ax = new float[num];
float[] ay = new float[num]; 


public void setup() 
{
  size(400, 400);
  for(int i=0; i<num; i++) {
    ax[i] = 50;
    ay[i] = height/2;
  }
  frameRate(30);
  noLoop();
}

public void draw() 
{
  background(51);
  
  // Shift all elements 1 place to the left
  for(int i=1; i<num; i++) {
    ax[i-1] = ax[i];
    ay[i-1] = ay[i];
  }

  // Put a new value at the end of the array
  ax[num-1] += random(-range, range);
  ay[num-1] += random(-range, range);

  // Constrain all points to the screen
  ax[num-1] = constrain(ax[num-1], 0, width);
  ay[num-1] = constrain(ay[num-1], 0, height);
  
  // Draw a line connecting the points
  for(int i=1; i<num; i++) {    
    float val = PApplet.parseFloat(i)/num * 204.0f + 51;
    stroke(val);
    line(ax[i-1], ay[i-1], ax[i], ay[i]);
  }
}
public void mousePressed() 
{
  loop();
  }
public void reset() {
   for(int i=0; i<num; i++) {
    ax[i] = 50;
    ay[i] = height/2;
   }
}
   public void keyPressed() {
  if (key =='c')
    reset();
    }
  
static public void main(String args[]) {   PApplet.main(new String[] { "third_processing" });}}