​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  let  v1 = createVector(10, 200);

  let v2 = createVector(300, 250);

  strokeWeight(4);

  line(v1.x, v1.y, v2.x, v2.y);

  let v3 = p5.Vector.lerp(v1,v2,amt);

  ellipse(v3.x,v3.y,20);

  amt +=0.01;

}