Turtle Line Dig Program

function DigForward()
  for a = 1,10 do
    turtle.dig()
    turtle.forward()
  end
end

function RotateForward()
  do
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.turnRight()
  end
end

function DigBack()
  for b = 1,10 do
    turtle.dig
    turtle.forward()
  end
end

function RotateBack()
  do
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.turnLeft()
  end
end

-- MAIN PROGRAM

for i = 1,2 do
  DigForward()
  RotateForward()
  DigBack()
  RotateBack()
end