bouncingball100

int numBalls = 100;

float[] x = new float[numBalls];

float[] y = new float[numBalls];

float[] xspeed = new float[numBalls];

float[] yspeed = new float[numBalls];

float diameter = 15;

​

void setup()

{

  size(500,700);

  frameRate(40);

  smooth();

  for (int i = 0; i < numBalls; i++) {

  x[i]=random(diameter, (width-diameter));

}

  for (int i = 0; i < numBalls;i++) {

  y[i]=random(diameter, height-diameter);

}

  for (int i = 0; i < numBalls;i++) {

  xspeed[i]=random(2,5);

}

  for (int i = 0; i < numBalls;i++) {

  yspeed[i]=random(2,5);

}

}

​

void draw()

{

  background(255,255,0);

  noStroke();

  for (int i = 0; i < numBalls;i++) {

    fill(0,i*2,255-i*2);

    ellipse(x[i],y[i],diameter,diameter);

​

  x[i] = x[i] + xspeed[i];

  y[i] = y[i] + yspeed[i];

​

​

 if ((x[i] > width-diameter/2) || (x[i] < diameter/2)) {

    xspeed[i] = xspeed[i] * -1;

  }

  if ((y[i] > height-diameter/2) || (y[i] < diameter/2)) {

    yspeed[i] = yspeed[i] * -1;}

  }

  }

​

​