Processing script for king dream fractal

float a, b, c, d, x, y, xp, yp;
PFont f;
int hit[][] = new int[800][800]; //set size of hit detection, should be equal to window size

void setup() {
  size(800, 800); //window size
  f = createFont("Arial", 16, true);
  a = -4.2; //parameters
  b = -0.5;
  c = -1;
  d = -2.2;
}

void draw() {
  makeFlame();
}

void makeFlame() {
  background(0);
  for (int i = 0; i < 800; i++) {
    for (int o = 0; o < 800; o++) {
      hit[i][o] = 0; //reset array
    }
  }
  xp = -2;
  yp = -2;
  for (int i = 0; i < 1000000; i++) { //iterations
    x = sin(yp * b) - c * sin(xp * b);
    y = sin(xp * a) + d * sin(yp * a);
    if (i > 100) {hit[int(constrain(map(x, -5, 5, 0, 800), 0, 800))][int(constrain(map(y, -5, 5, 0, 800), 0, 800))] += 1;} //discard first 100 points
    xp = x;
    yp = y;
  }
  int max = 0;
  for (int i = 0; i < 800; i++) {
    for (int o = 0; o < 800; o++) {
      max = max(hit[i][o], max);
    }
  }
  for (int i = 0; i < 800; i++) {
    for (int o = 0; o < 800; o++) {
      if (hit[i][o] > 0) {set(i, o, color(constrain(log(float(hit[i][o])) * 100, 0, 255)));} //logarithmic color scale
      //if (hit[i][o] > 0) {set(i, o, color(255));} //hit or not hit color scale
    }
  }
  fill(255, 0, 0);
  noStroke();
  textFont(f, 20);
  text("a = " + str(a) + "\nb = " + str(b) + "\nc = " + str(c) + "\nd = " + str(d), 10, 30); //draw text
}