Wall Skript Segment

  if block 1 to the left is air:
    set block at block 1 left to stone

  if block 1 to the left of the block 1 upwards is air:
    set block at block 1 left of block 1 upwards to stone

  if block 1 upwards is air:
    set block at block 1 upwards to stone

  if block 1 to the right of the block 1 upwards is air:
    set block at block 1 right of block 1 upwards to stone

  if block 1 to the right is air:
    set block at block 1 right to stone