kadai4

let vecLocation = [];

let vecVelocity = [];

const NUM = 1000;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  frameRate(60);

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

  vecLocation[i] = createVector(width/2,height/2);

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

}

}

function draw() {

  background(0);

  noStroke();

  fill(225);

    let x = random(width);

   let y = random(height);

   let diameter = random(100);

   fill(random(x * 0.5),100,y / height * 100,127)

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

    ellipse(vecLocation[i].x,vecLocation[i].y, 20, 20);

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

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

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

      }

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

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

      }

    }

}