createCanvas(400, 400);

​

  let x;

  let y;

  let newX

  let newY

  let xChange

  let yChange

​

  for (let i = 0; i < 20; i++) {

    stroke(random(255), random(255), random(255));

    x = random(width);

    y = random(height);

    xChange = random(-50,50)

    yChange = random(-50,50);

​

    do{

      let newX=x+ xChange

    } while (newX>width || newX<0)

   let newY = y +yChange

      line(x,y,xChange,yChange);

     x=newX

      y=newY

  }

}

​