let memory_y = [];

​

let x1 = [];

let y1 = [];

​

let x2 = [];

let y2 = [];

​

let length;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  for(let i = 0; i<20; i++){

    x1[i] = int(random(-100,width));

    x2[i] = x1[i] + int(random(60));

  }

  for(let j = 0; j<20; j++){

    y1[j] = int(random(-100,height));

    y2[j] = y1[j] + int((random(70)));

  }

  frameRate(10);

  noStroke();

  length = int(random(80));

}

​

function draw() {

  background(0);

  //translate(0,0);

  //scale(int(random(20,30)));

  for(let i = 0; i<20; i++){

      fill(random(255),random(255),random(255));

      let x3 = x2[i]+int(random(70));

      let y3 = y2[i]+int(random(50));

      triangle(x1[i],y1[i],x2[i],y2[i],x3,y3);

      memory_x = [x2[i],x3];

      memory_y = [y2[i],y3];

    for(let n = 0; n<length; n++){

      fill(random(255),random(255),random(255));

      x3 = memory_x[1]+int(random(70));

      y3 = memory_y[1]+int(random(-20,70));

      triangle(memory_x[0],memory_y[0],

              memory_x[1],memory_y[1],

              x3,y3);

      memory_x = [memory_x[1],x3];

      memory_y = [memory_y[1],y3];

    }

  }

  //noLoop();

}