float i;
int x2;
double x, a;

void setup() {
size(1500, 800);
background(0);
i = 0;
}

void draw() {
a = map(i, 0, 1500, 3.5698, 3.57);
x = random(0, 1);
for (int j = 0; j < 20000; j++) {
x = a * x * (1 - x);
x2 = int(map((float)x, 0.8907, 0.8912, height, 0));
if (j > 18000 && x2 >= 0 && x2 <= height) {
set(int(i), x2, color(255));
}
}
println(i);
i++;
if (i > 1500) {delay(100000);}
}