var arrx=[];

var arry=[];

var cycles=[];

var basespeed=20;

var cyclelim=50;

​

​

var numballs=15;

var ballsize=50;

​

function setup() {

  createCanvas(1000, 1000);

  for(var i=0; i<numballs; i++)

  {

  vels[i]=basespeed+ (i*1.019);

  arrx[i]=width/2;

  arry[i]=ballsize+(i*ballsize);

  cycles[i]=0;

  }    

}

​

function draw() {

  background(0);

  fill('silver');

for(var i=0; i<numballs; i++)

  {

  circle(arrx[i], arry[i], ballsize);

  }

udate();

}

​

​

function udate()

{

for(var i=0; i<numballs; i++)

{

if((arrx[i]+vels[i]<=width-(ballsize/2)) && (arrx[i]+vels[i]>ballsize/2))

{

arrx[i]+=vels[i]

}

else

  {

  vels[i]*=-1;

  arrx[i]+=vels[i];

 // cycles[i]++;

  }

}

}