Shutdown

int numBars = 100;

​

Bar[] bars = new Bar[numBars];

void setup() {

size(500, 500);

smooth();

noStroke();

for (int i = 0; i < bars.length; i++) {

float x =  i*5;

float rate = 0.5 + i*0.05;

bars[i] = new Bar(x, 250, 5, rate);

}

}

void draw() {

fill (random(0,150),random(0,255));

rect(0, 0, width, height);

fill (random(0,255),random(0,255),random(0,255));

for (int i = 0; i < bars.length; i++) {

bars[i].move(); 

bars[i].display(); 

}

}

class Bar {

float x, y; 

float breadth; 

float speed; 

int direction = -1; 

​

Bar(float xpos, float ypos, float br, float sp) {

x = xpos;

y = ypos;

breadth = br;

speed = sp;

}

void move() {

y += (speed * direction);

if ((y > (height - breadth/2)) || (y < breadth/2)) {

direction *= -1;

}

}

void display() {

rect(x, y, breadth, breadth+100);

}

}