Let it snow tonight

let num = 200; 

let vecLocation = []; 

let vecVelocity = []; 

let snow;

​

function setup() {

  createCanvas(windowWidth, windowHeight); 

  frameRate(20); 

  locationY = 0;

  for (let i = 0; i < num; i++) {

    vecLocation[i] = createVector(random(windowWidth), 0);

    vecVelocity[i] = createVector(random(-10, 10), random(-10, 10));

  }

}

​

function draw() {

  fill(0, 34, 112);

  rect(0, 0, windowWidth, windowHeight); 

  fill(230);

  rect(0, windowHeight / 1.6, windowWidth, windowHeight /1.6);

  fill(255);

  rect(0, 0, windowWidth, 10);

noStroke();

let size = random(10,20);

​

for (let i = 0; i < num; i++) {

  vecLocation[i].add(vecVelocity[i]); 

  ellipse(vecLocation[i].x, vecLocation[i].y, size, size); 

        fill(255);

    if (vecLocation[i].x < 0 || vecLocation[i].x > width) {

      vecVelocity[i].x = vecVelocity[i].x * -1; 

    fill(random(100,255), random(100,255), 0); 

    }

    if (vecLocation[i].y < 0 || vecLocation[i].y > height) { 

      vecLocation[i].y = locationY; 

    }

}

}