float[] position = new float[4];
float[] temp = new float[4];
float[] c = new float[4];
int i,n;
color colour;
float aa,bb,cc,dd,twoab,twoac,twoad;
float increment = 0.01;
float xmin,xmax,ymin,ymax;
float xsize,ysize,incrementx,incrementy;
void setup(){

  position[3] = 0;
  position[2] = 0;
  size(750,750);
  background(255);
  xmin=-2;
  xmax=2;
  ymin=-2;
  ymax=2;
  xsize=abs(xmin-xmax);
  ysize=abs(ymin-ymax);
  incrementx=xsize/width;
  incrementy=ysize/height;
  textSize(20);
  textAlign(CENTER,CENTER);

}
void draw(){
  julia();

text (c[0] + "\n" + c[1] +"\n" + c[2] + "\n" + c[3],375,75);
move();
stroke(255);
line(0,375,750,375);
line(375,0,375,750);
}

void julia(){
  loadPixels();

position[1] = ymin;
  for (int j = 0; j < height; j ++) {

    position[0] = xmin;
    for (int i = 0;  i < width; i ++) {
      funtion(position);


      if (n <= 10) {
        colour = color(map(n,0,10,0,255),0,0);
      }
      if (10< n && n<= 20){
        colour = color(255,map(n,10,20,0,255),0);
      }
      if (20<n && n<=30){
         colour = color(map(n,20,30,255,0),255,0);
      }
      if (30 < n && n<=40){
         colour = color(0,255,map(n,30,40,0,255));
      }
      if ( 40 < n && n<=50){
         colour = color(0,map(n,40,50,255,0),255);
      }
      if ( 50<n && n<=60){
         colour = color(map(n,50,60,0,255),0,255);
      }
      if ( n>60){
         colour = color(255,map(n,60,100,0,255),255);
      }
      pixels[i+j*width] = colour;

      position[0] += incrementx;
    }
    position[1]+= incrementy;
  }
  updatePixels();
  stroke(255);

}

int funtion(float[] a){

       temp[0] = a[0];
       temp[1] = a[1];
       temp[2] = a[2];
       temp[3] = a[3];
       n = 0;

      while (n < 100) {
        aa=temp[0]*temp[0];
        bb=temp[1]*temp[1];
        cc=temp[2]*temp[2];
        dd=temp[3]*temp[3];
        twoab=2*temp[0]*temp[1];
        twoac=2*temp[0]*temp[2];
        twoad=2*temp[0]*temp[3];
        temp[0] = aa - bb - cc - dd + c[0];
        temp[1] = twoab + c[1];
        temp[2] = twoac + c[2];
        temp[3] = twoad + c[3];

        if(aa + bb + cc + dd > 16.0) {
          break;
        }
        n ++;
      }
  return n;
}


void move(){
  if (mousePressed==true){
  if (mouseY<50){
      if (mouseX<375){
    c[0]+=map(mouseX,0,375,0.1,0);

  }
      if (mouseX>375){
    c[0]-=map(mouseX,750,375,0.1,0);;
  }
  }
  if (mouseY>700){
    if (mouseX<375){
      c[1]+=map(mouseX,0,375,0.1,0);;
  }
    if (mouseX>375){
    c[1]-=map(mouseX,750,375,0.1,0);;
  }
  }
  if (mouseX<50){
    if (mouseY<375){
    c[2]+=map(mouseY,0,375,0.1,0);;
  }
    if (mouseY>375){
    c[2]-=map(mouseY,750,375,0.1,0);;
  }
  }
  if (mouseX>700){
    if (mouseY<375){
    c[3]+=map(mouseY,0,375,0.1,0);;
  }
  if (mouseY>375){
    c[3]-=map(mouseY,750,375,0.1,0);;
  }
  }
  }
  if(keyPressed==true){
  if( key=='a'){
    position[2]+=0.01;
  }
  if (key=='d'){
    position[2]-=0.01;
  }
  }
}