//import processing.pdf.*;
boolean on = true;

float pen;
float r = 2;
int num = 25;  
float mx[] = new float[num];  
float my[] = new float[num];
float fadeValue;
int frameCounter;

color c1 = color (0, 175, 235);
color c2 = color (237, 0, 136);
color c3 = color (255, 240, 75);
Splatter splat;

void setup() {
  size(600, 600);
  background(255);
  frameRate(30);
  smooth();
}

void draw() {

  if (on) {
    pen = 24/dist(pmouseX, pmouseY, mouseX, mouseY);
    strokeWeight(pen);

    stroke(c1);
    fill(c1);
    line(pmouseX, pmouseY, mouseX, mouseY);
    if (dist(pmouseX, pmouseY, mouseX, mouseY) < 1) {
      splat = new Splatter(mouseX, mouseY);
      splat.display();
    }

    pushMatrix() ;
    translate(width/2, height);    
    rotate(5*TWO_PI/8);
    stroke(c2);
    fill(c2);
    line(pmouseX, pmouseY, mouseX, mouseY);
    if (dist(pmouseX, pmouseY, mouseX, mouseY) < 1) {
      splat = new Splatter(mouseX, mouseY);
      splat.display();
    }
    popMatrix();

    pushMatrix();
    translate(width, 0);
    scale(-1.0, 1.0);
    stroke(c3);
    fill(c3);
    line(pmouseX, pmouseY, mouseX, mouseY);
    if (dist(pmouseX, pmouseY, mouseX, mouseY) < 1) {
      splat = new Splatter(mouseX, mouseY);
      splat.display();
    }

    popMatrix();

    pushMatrix();
    translate((width/2), -100);
    rotate(TWO_PI/8);
    stroke(255);
    fill(255);
    if (dist(pmouseX, pmouseY, mouseX, mouseY) < 1) {
      splat = new Splatter(mouseX, mouseY);
      splat.display();
    }
    line(pmouseX, pmouseY, mouseX, mouseY);
    popMatrix();


    for (int i=1; i<num; i++) {  
      mx[i-1] = mx[i];  
      my[i-1] = my[i];
    }  

    mx[num-1] = mouseX;  
    my[num-1] = mouseY;  

    if (mousePressed) {

      for (int i=0; i<num; i++) {
        fadeValue = map(i, 0, num, 0, 255);

        pen = 6/dist(pmouseX, pmouseY, mouseX, mouseY);
        strokeWeight(pen);

        stroke(c1, fadeValue);
        fill(c1, fadeValue);
        line(pmouseX, pmouseY, mx[i], my[i]);
        ellipse(pmouseX, pmouseY, r, r);

        pushMatrix() ;
        translate(width/2, height);
        rotate(5*TWO_PI/8);
        stroke(c2, fadeValue);
        fill(c2, fadeValue);
        line(pmouseX, pmouseY, mx[i], my[i]);

        ellipse(pmouseX, pmouseY, r, r);
        popMatrix();

        pushMatrix();
        translate(width, 0);
        scale(-1.0, 1.0);
        stroke(c3, fadeValue);
        fill(c3, fadeValue);
        line(pmouseX, pmouseY, mx[i], my[i]);
        ellipse(pmouseX, pmouseY, r, r);
        popMatrix();

        pushMatrix();
        translate(width/2, -100);
        rotate(TWO_PI/8);
        stroke(255);
        fill(255, fadeValue);
        line(pmouseX, pmouseY, mx[i], my[i]);
        ellipse(pmouseX, pmouseY, r, r);
        popMatrix();
      }
    }
  }
}

void keyPressed() {
  if (key == ' ') {
    on = false;
  } else if (key == 'c' || 'C') {
    fill(255);
    rect(0, 0, width, height);
    on = true;
  }
}


class Splatter {   

  // Location and size
  float x, y;
  float rad;

  Splatter (float xPos, float yPos) { 
    // Initialize variables randomly
    x = xPos;
    y = yPos;  
    rad = random(2, 12);
  }   

  void display() { 
    // Display circle
    x += random(-24, 24); 
    y += random(-24, 24); 
    noStroke();
    ellipse(x, y, rad, rad);
  }
}