47

int num = 2000;
float[] x = new float[num];
float[] y = new float[num];
PImage img;

void setup(){
size(200,200);
img = loadImage("antoineklein.jpg");
for(int i =0; i < num; i++){
x[i] = random(width);
y[i] = random(height);
}
stroke(255);
}

void draw(){
background(0);
for(int i = 0; i < num; i++){
color c = img.get(int(x[i]),int(y[i]));
float b = brightness(c)/255.0;
float speed = pow(b,2)+0.05;
if(x[i] > width){
x[i] = 0;
y[i] = random(height);
}
point(x[i],y[i]);
}

}