y = 0;

let xoff = 0;

let count = 0;

let aKey = 1;

​

function setup() {

  createCanvas(700, 700);

  background(50);

  strokeWeight(1);

  stroke(250, 50);

}

​

function draw() {

​

  xoff = xoff + 0.02;

  let n = noise(xoff) * 200;

  x = x + 2;

  line(x, 0, x, n * aKey);

  if (x > width + 20) {

    x = -21;

    count = count + 1;

  }

​

}

​

function keyPressed() {

  if (keyCode == DELETE || keyCode == BACKSPACE) background(50);

  x = -21;

  if (key == 's' || key == 'S') saveCanvas();

  if (key == '1') aKey = 1;

  if (key == '2') aKey = 2;

  if (key == '3') aKey = 3;

  if (key == '4') aKey = 4;

  if (key == '5') aKey = 5;

}