Pushy universe

function setup() {
  createCanvas(400, 400);
  for (let i = 0; i < 30; i ++) {
    points[i] = [random(400), random(400), 0, 0]
  }
}

let points = []

function draw() {
  background(220);
  let s = 0
  for (let i = 0; i < points.length; i ++) {
    for (let j = 1; j < points.length; j ++) {
      let k = (i + j + points.length) % points.length
      let minDiff = [(points[i][0] - points[k][0] + 600) % 400 - 200, (points[i][1] - points[k][1] + 600) % 400 - 200]
      let minD = minDiff[0]**2 + minDiff[1]**2
      let minDrt = sqrt(minD)
      s += minDrt
      if (minD > 1) {
        points[i][2] += minDiff[0] / minD
        points[i][3] += minDiff[1] / minD
      }
    }
  }
  for (let i = 0; i < points.length; i ++) {
    points[i][2] *= 0.99
    points[i][3] *= 0.99
    points[i][0] += points[i][2]
    points[i][1] += points[i][3]
    points[i][0] = (points[i][0] % 400 + 400) % 400
    points[i][1] = (points[i][1] % 400 + 400) % 400
    circle(points[i][0], points[i][1], 10)
    circle(points[i][0]-400, points[i][1], 10)
    circle(points[i][0], points[i][1]+400, 10)
    circle(points[i][0]+400, points[i][1], 10)
    circle(points[i][0], points[i][1]-400, 10)
  }
  //text(s.toFixed(3), 0, 10)
}

function mousePressed() {
  points.push([mouseX, mouseY, 0, 0])
}