float xMin=-2.5;
float xMax=4;
float yMin=-1.4;
float yMax=2.8;
//
float infinity=50;
float iterationMax=random(15,150);
int iMax=int(iterationMax);
//
int k=0;
float r=random(100,255);
float g=random(100,255);      
float b=random(100,255); 


void setup(){
  size(600,500);
  loadPixels();
}

int main(float tx, float ty){
  float x=0;
  float y=0;
  int i;
  for(i=0;i<iMax;i++){
    float nx=x*x-y*y+tx;
    float ny=2*x*y+ty;
    if(nx*nx+ny*ny>infinity){
      return i;
    }
    x=nx;
    y=ny;
  }
  return i;
}

void draw(){
  if(k>=height){
    noLoop();
    //
    PFont font;
    font=loadFont("arial.vlw") ;
    textFont(font,12);
    text("Max Iteration: "+iMax,width-100,height-35);
    fill(255,255,255);
    text("Infinity: "+infinity,width-100,height-20);
    fill(255,255,255);    
    //
  } else {
    for(int j=0;j<width;j++){
      float xx=xMin+xMax/width*j;
      float yy=yMin+yMax/height*k;
      float colorFactor=main(xx,yy)/iMax;  
      color c=color(colorFactor*r,colorFactor*g,colorFactor*b);
      pixels[k*width+j]=c;
    }
    updatePixels();
    k++;
  }
}