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                function setup() {
  createCanvas(400, 400); //create the canvas

function draw() {
  x1 = random(400); //assign a random x value with the canvas size in mind
  y1 = random(400); //assign a random y value with the canvas size in mind
  x2 = random(400);
  y2 = random(400);
  if (x1 != x2){ //do not plot if the x's are the same (vertical)
    slope = (y2-y1)/(x2-x1);//calculate slope
    strokeWeight(0.2) //thicknes of the lines
    if (slope <0){ //condition for a negative slope
      stroke(168, 121, 50) //negative slopes are blue
    if (slope >0){ //condition for positive slope
      stroke(92, 169, 250); //positive slopes are orange/brown
    if (slope == 0){ //condition for a horizontal line