RandomLines

function setup() {
  createCanvas(400, 400);
  frameRate(300);
}

function draw() {
  x1 = random(400);
  y1 = random(400);
  x2 = random(400);
  y2 = random(400);
  if (x1 != x2){
    slope = (y2-y1)/(x2-x1);//calculate slope
    strokeWeight(0.2)
    if (slope <0){
      stroke(168, 121, 50)
    }
    if (slope >0){
      stroke(92, 169, 250);
    }
    if (slope == 0){
      stroke(0)
    }
    line(x1,y1,x2,y2)
  }
  
}