falling

float [] X;
float [] Y;
float [] size;
float [] speed;

int quantity = 20;

void setup () {
    size (1000, 800);

    X = new float [quantity];
    Y = new float [quantity];
    size = new float [quantity];
    speed = new float [quantity];

    for (int i = 0; i < quantity; ++i){
        X [i] = random (width);
        Y [i] = random (height);
        size [i] = random (width * 0.1);
        speed [i] = random (height * 0.002, height * 0.01);

    }
}

void draw () {
    background (0);
    for (int i = 0; i < quantity; ++i){
        circle (X[i], Y[i], size [i]);
        Y[i] += speed [i];
    }
}