var yPos = [];

var blues =[];

var speeds= [];

​

function setup() {

  createCanvas(400, 400);

  background(0)

  var count = 0 

  while (count < 50){

  append(xPos,random(400));

  append(yPos,random(400));

  append(blues,random(240));

  append(speeds,random(6,8)); 

    count++;

  }

​

}

​

function draw() {

  background(0,0,0,80);

  noStroke();

  var i= 0;

  while (i < xPos.length){

    fill(blues[i],blues[i],blues[i]);

    rect(xPos[i],yPos[i],4,20);

    yPos[i]=yPos[i]+speeds[i];

    // xPos[i] = xPos[i]+random(-1,1);

    if(yPos[i]>400){

      yPos[i]=0;

    }

    i++; //i= i + 1;

  }

  ellipse(200,200,50,50)

}