寄生虫 - OpenProcessing

mySketch
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let vecLocation=[];
let vecVelocity=[];
const NUM=100;
function setup() {
  createCanvas(windowWidth, windowHeight);
  frameRate(30);
  for(let i=0;i<NUM;i++){
  vecLocation[i]=createVector(width/3,height/3);
  vecVelocity[i]=createVector(random(-20,10),random(-10,10))
  }
}
​
function draw() {
  background(216,191,216);
  noStroke();
  fill(random(255),random(255),random(255));
  for(let i=0;i<NUM;i++){
  ellipse(vecLocation[i].x,vecLocation[i].y,random(20,60),random(20,50));
   vecLocation[i].add(vecVelocity[i]);
  if(vecLocation[i].x>width || vecLocation[i].x<0){
    vecVelocity[i].x=vecVelocity[i].x*random(-2,2);
  }
   if(vecLocation[i].y>height || vecLocation[i].y<0){
    vecVelocity[i].y=vecVelocity[i].y*random(-2,2);
   }
  }
​
}