int pressMode = 0;
int maxTrailLength = 5000;
int[][] trail = new int[maxTrailLength][3];
int trailCounter = 0;
int justOnce = 0;
int fadeRate = 100;
int wobble = 2;

void setup ()
{
  
  size(800,600);
  framerate(100);
  colorMode(HSB, 1.0);
  background(0);
  
  stroke(1);
  
}



void draw ()
{
  
  if( pressMode == 1 ) {
    if( justOnce == 0 ) {
      stroke(1, 1);
      background(0.85, 0.05, 0);
      trailCounter = 0;
      for( int i = 0; i < maxTrailLength; i++ ) {
        trail[i][0] = 0;
        trail[i][1] = 0;
        trail[i][2] = 0;
      }
    }
    trail[trailCounter][0] = mouseX;
    trail[trailCounter][1] = mouseY;
    trail[trailCounter][2] = fadeRate;
  }
  
  background(0.9, 1, 0.15);
  for( int i = 3; i < trailCounter; i++ ) {
    stroke(float(trail[i][2])/fadeRate, 1, 1, float(trail[i][2])/fadeRate);
    strokeWeight(abs(fadeRate/float(trail[i][2])));
    bezier(trail[i-3][0], trail[i-3][1], trail[i-2][0], trail[i-2][1], trail[i-1][0], trail[i-1][1], trail[i][0], trail[i][1]);
  }
  for( int i = 0; i < trailCounter; i++ ) {
    trail[i][0] = trail[i][0] + int(random(-wobble, wobble)) + int((trail[i][0]-width/2)*0.0125);
    trail[i][1] = trail[i][1] + int(random(-wobble, wobble)) + int((trail[i][1]-height/2)*0.0125);
    trail[i][2]--;
  }
  trailCounter++;
  
  if( pressMode == 0 ) {
    justOnce = 0;
  } else {
    justOnce = 1;
  }
  
}



void mousePressed() 
{
  pressMode = 1;
} 



void mouseReleased() 
{
  pressMode = 0;
}