boolean[][] poopList;
BImage poop, mouse;

void setup(){
  size(250,250);
  background(255,255,255);
  poopList = new boolean[width][height];
  poop = loadImage("poop.gif");
  mouse = loadImage("mouse.gif");
}

void loop(){
  //iterate through pooplist
  for(int i=0; i<width; ++i){
    for(int j=0; j<height; ++j){
      if(poopList[i][j]) drawPoop(i,j);
    }
  }
  
  drawMouse(mouseX,mouseY);
}

void mouseDragged(){
  int r = int( random(10) );
  if(r<2)
  addPixel( mouseX, mouseY);
}

void addPixel( int x, int y ){
  poopList[x][y] = true;
}

void drawPoop(int x, int y){
  image(poop,x,y);
  /*
  //the following lines draw a poop shape. looks, well, poopier than the imported .gif so i don't use them.
  int h=3;
  int w=20;
  
  int xStart = x;
  int yStart = y;
    
  beginShape(POLYGON);
  curveVertex(xStart,yStart);
  curveVertex(xStart,yStart);
  curveVertex(xStart+(w/10),yStart-(h/3) );
  curveVertex( xStart+2*(w/10),yStart- 2*(h/3) );
  curveVertex( xStart+5*(w/10), yStart-(h) );
  curveVertex( xStart+8*(w/10), yStart-2*(h/3) );
  curveVertex(xStart+w,yStart);
  curveVertex( xStart+8*(w/10), yStart+2*(h/3) );
  curveVertex( xStart+5*(w/10), yStart+(h) );
  curveVertex( xStart+2*(w/10),yStart+ 2*(h/3) );
  curveVertex(xStart+(w/10),yStart+(h/3) );
  curveVertex(xStart+(w/10),yStart+(h/3) );
  endShape();
  */
}

void drawMouse(int x, int y){
  imageMode(CENTER_DIAMETER);
  image(mouse,x,y);
  /*
  //the following lines draw a mouse shape. looks worse than the imported .gif so i don't use them.
  
  int x1 = x;
  int y1 = y;

  int xintv = 3;
  int yintv = 3;
  
  beginShape(POLYGON);
  //nose
  curveVertex(x1,y1+6*yintv);
  curveVertex(x1,y1+6*yintv);
  //ear
  curveVertex(x1+xintv,y1+4*yintv);
  curveVertex(x1+2*xintv,y1+3*yintv);
  curveVertex(x1+2*xintv,y1);
  curveVertex(x1+4*xintv,y1+yintv);
  //back
  curveVertex(x1+3*xintv,y1+3*yintv);
  curveVertex(x1+6*xintv,y1+yintv);
  curveVertex(x1+8*xintv,y1);
  curveVertex(x1+11*xintv,y1+yintv);
  curveVertex(x1+12*xintv,y1+4*yintv);
  curveVertex(x1+11*xintv,y1+6*yintv); 
  //tail
  curveVertex(x1+16*xintv,y1+7*yintv); 
  curveVertex(x1+20*xintv,y1+6*yintv); 
  curveVertex(x1+19*xintv,y1+4*yintv); 
  curveVertex(x1+21*xintv,y1+6*yintv); 
  curveVertex(x1+19*xintv,y1+8*yintv); 
  curveVertex(x1+11*xintv,y1+6*yintv); 
  //curveVertex(x1+11*xintv,y1+7*yintv); 
  //belly
  curveVertex(x1+6*xintv,y1+7*yintv); 

  
  //nose again!
  curveVertex(x1,y1+6*yintv);
  curveVertex(x1,y1+6*yintv);
      
                  endShape();    
                  */
  
}