Obsidian forever

--Author: Ferrwolf
-- This program is designed for user to place lava in two 2x18 areas
-- connected by one block removed in the center on the end where the user started digging.
-- Pour water on lava and run turtle program. Instant obsidian. :)
-- this is an example ==================
--                    ==================
--                    =
--                    ==================
--                    ==================
-- Each equal sign is where the blocks should be removed and lava placed.

-- Turtle mines the first row of obsidian
for i=0,18 do
  while not turtle.forward() do
    turtle.attack()
    turtle.dig()
  end
end

-- Sets the turtle up to mine the second row
turtle.turnRight()
turtle.dig()
while not turtle.forward() do
  turtle.attack()
  turtle.dig()
end
turtle.turnRight()

-- Turtle mines the second row
for i=0,17 do
  while not turtle.forward() do
    turtle.attack()
    turtle.dig()
  end
end

-- Turtle moves the the second plot and prepares to mine the 3rd row
turtle.turnLeft()
turtle.dig()
while not turtle.forward() do
    turtle.attack()
    turtle.dig()
end
turtle.dig()
while not turtle.forward() do
    turtle.attack()
    turtle.dig()
end
turtle.turnLeft()

-- Turtle mines the 3rd row
for i=0,17 do
  while not turtle.forward() do
    turtle.attack()
    turtle.dig()
  end
end

-- Turtle prepares to mine 4th row
turtle.turnRight()
turtle.dig()
while not turtle.forward() do
    turtle.attack()
    turtle.dig()
end
turtle.turnRight()

-- Turtle mines the 4th row
for i=0,17 do
  while not turtle.forward() do
    turtle.attack()
    turtle.dig()
  end
end

-- Returns turtle to starting point
turtle.turnRight()
for i=0,3 do
turtle.forward()
end
turtle.turnRight()
turtle.back()
print("Complete!")