Как сгенирировать препятствия в раннере на Unity?

createWall() {
minHeight = 10;
maxHeight = 30;
minWidth = 20;
maxWidth = 40;

width = Random.value * (maxWidth - minWidth) + minWidth;
height = Random.value * (maxHeight - minHeight) + minHeight;

// code to place wall
}

minDistanceBetweenWalls = 100;
distance = 0;

ticker() {
  distance++;

  if (distance > minDistanceBetweenWalls) {
    // some chance to place wall
    if (Random.value > .9) {
      createWall();
      distance = 0;
    }
  }
}