TIS-100 specification: FIZZBUZZ

function get_name()
  return "FIZZBUZZ"
end

function get_description()
  return {
    "WRITE 1,2,...,117 TO OUT.1, OUT.2, OUT.3, BUT",
    "IF MULTIPLE OF 3, REPLACE BY -1",
    "IF MULTIPLE OF 5, REPLACE BY -2",
    "IF BOTH, REPLACE BY -3",
  }
end

function get_streams()
  out1 = {}
  out2 = {}
  out3 = {}

  for i = 1, 117 do
    number = i
    if i % 3 == 0 then number = -1 end
    if i % 5 == 0 then number = -2 end
    if i % 15 == 0 then number = -3 end
    target = math.floor((i-1) / 39)
    if target == 0 then out1[i    ] = number end
    if target == 1 then out2[i- 39] = number end
    if target == 2 then out3[i- 78] = number end
  end

  return {
    {STREAM_OUTPUT, "OUT.1", 0, out1},
    {STREAM_OUTPUT, "OUT.2", 1, out2},
    {STREAM_OUTPUT, "OUT.3", 2, out3},
  }
end

function get_layout()
  return {
    TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE,
    TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE,
    TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE, TILE_COMPUTE,
  }
end