Bouncing Ball /Array

int numball=10;

​

float[] posX=new float[numball];

float[] posY=new float[numball];

float[] xSpeed=new float[numball];

float[] ySpeed=new float[numball];

float[] red=new float[numball];

float[] green=new float[numball];

float[] blue=new float[numball];

​

void setup() {

  size(400, 400);

  background(120);

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

    posX[i]=random(40, width-40);

    posY[i]=random(40, height-40);

    xSpeed[i]=random(-10, 10);

    ySpeed[i]=random(-10, 10);

    red[i]=random(0,255);

    green[i]=random(0,255);

    blue[i]=random(0,255);

  }

  noStroke();

  }

​

void draw() {

  background(150);

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

    fill(red[i],green[i],blue[i]);

    ellipse(posX[i], posY[i], 40, 40);

    if (posX[i]>=width-20||posX[i]<=20) {

      xSpeed[i]=-xSpeed[i];

      red[i]=random(0,255);

      green[i]=random(0,255);

      blue[i]=random(0,255);

    }

    if (posY[i]>=height-20||posY[i]<=20) {

      ySpeed[i]=-ySpeed[i];

      red[i]=random(0,255);

      green[i]=random(0,255);

      blue[i]=random(0,255);

    }

      posY[i]=posY[i]+ySpeed[i];

      posX[i]=posX[i]+xSpeed[i];

  }

}