turtle destination bombing

local args = {
  ...
}
if not #args == 3 then
  print('Usage: bomb <x> <y> <z>')
end
local x, y, z = tonumber(args[1]), tonumber(args[2]), tonumber(args[3])
for i = 1, x do
  turtle.forward()
end
for i = 1, y do
  turtle.up()
end
if z < 0 then
  turtle.turnLeft()
else
  turtle.turnRight()
end
for i = 1, z do
  turtle.forward()
end
rs.setOutput('bottom', true)
turtle.select(1)
turtle.placeDown()
turtle.turnLeft()
turtle.turnLeft()
for i = 1, z do
  turtle.forward()
end
if z < 0 then
  turtle.turnRight()
else
  turtle.turnLeft()
end
for i = 1, y do
  turtle.down()
end
for i = 1, x do
  turtle.forward()
end
turtle.turnRight()
turtle.turnRight()