let mousePositions = [];

const MAX_POS = 50;

​

function setup() {

  createCanvas(300, 400);

  capture = createCapture(VIDEO);

  capture.size(300, 400);

  capture.hide();

}

​

function draw() {

  background(220);

  //how you're drawing your pose

  ellipse(mouseX, mouseY, 50, 50);

  //how you're storing the last 50 poses

  mousePositions.push({x: mouseX, y: mouseY});

  //removes poses that are older than 50

  if (mousePositions.length > MAX_POS) {

     mousePositions.shift();

  }

  for (let i = 0; i < mousePositions.length; i +=1) {

    // how you want to draw the previous poses

    // relate it to i to change pose drawing over time

    ellipse(mousePositions[i].x, mousePositions[i].y, i, i);

  }

}