let numLines = 100;

​

function setup() {

  createCanvas(400, 400);

  // generating our random values

  for (let i = 0; i < numLines; i +=1) {

    myArray[i] = random(0, 255);

  }

  print(myArray);

}

​

function draw() {

  background(255);

  //ellipse(mouseX, mouseY, 50, 50);

  let lineSpacing = width/numLines;

  // using our random values

  for (let i = 0; i < numLines; i += 1) {

    // stroke(random(0, 255));

    //print(myArray[i]);

    stroke(myArray[i]);

    line(i*lineSpacing, 0, i*lineSpacing, height);

  }

  ellipse(mouseX, mouseY, 50, 50);

}