let twodEnd = [];

let distances = [];

let x1 = 0;

let y1 = 0;

let start = false; 

let count = 0;

​

function setup() {

  createCanvas(600, 600);

}

​

function draw() {

  background(220);

​

  if (twod.length>0 && (twod.length == twodEnd.length)){

​

​

    let largestD = 0;

    let nums = 0;

    for (i=0; i<distances.length; i++) {

      if (distances[i] > largestD) {

      largestD = distances[i];

      nums = i;

    }

  } 

​

    for (i=0; i<twod.length; i++) {

      if (i==nums) {

        stroke("red");

      } else {

        stroke(0);

      }

      strokeWeight(5);

      line(twod[i][0], twod[i][1], twodEnd[i][0], twodEnd[i][1]);

    }

  }

}

​

​

​

function mousePressed() {

  twod.push([mouseX, mouseY]);

  return false;

}

​

function mouseReleased() {

  twodEnd.push([mouseX,mouseY]);

​

  let x1 = twod[twod.length-1][0];

  let y1 = twod[twod.length-1][1];

  let x2 = twodEnd[twod.length-1][0];

  let y2 = twodEnd[twod.length-1][1];

​

  let distance1 = ((x2-x1)**2 + (y2-y1)**2)**0.5

  distances.push(distance1);

}

​