​

function setup() {

  createCanvas(400, 400)

  pos = createVector(width/2, height/2)

   background("#000")

}

​

function draw() {

  stroke(220, 0, 125, 255)

  strokeWeight(3)

  point(pos.x, pos.y)

  pos.x += random(-4,4)

  pos.y += random(-4,4)

}