gd: rows 2 columns 3 (<cap) {
  grid-rows: 2
  grid-columns: 3

  a
}

steps: {
  1: {
    gd.b
  }
  2: {
    gd.c
  }
  3: {
    gd.d
  }
  4: {
    gd.e
  }
  5: {
    gd.f
    gd: rows 2 columns 3 (=cap)
  }
  6: {
    gd.style.opacity: 1
  }
  7: {
    gd.style.opacity: 1
  }
  8: {
    gd.g
    gd: rows 2 columns 3 (>cap)
  }
  9: {
    gd.h
  }
  10: {
    gd.i
  }
  11: {
    gd.j
  }
  12: {
    gd.k
  }
  13: {
    gd.l
  }
  14: {
    gd.style.opacity: 1
  }
}
