var starY = []; // creating a blank array

var starS = []; // creating a blank array

var starC = [];

​

function setup(){

  createCanvas(1280,720);

  background(0);

  for(var i = 0; i<200; i++){  // this for loop will iterate 100 times ...

    starX.push(random(0, 1280));  // adding a random value to the end array

    starY.push(random(0, 720)); 

    starS.push(random(2, 10));

    starC.push(random(0,255));

  } 

}

​

function draw(){

  background(0);

  fill(255,255,0);

  for(var i = 0; i<200; i++){  // this loop will iterate 100 times as well

    fill(starC[i]);

    ellipse(starX[i], starY[i], starS[i], starS[i]);    // reading the values of the arrays

  }

​

}