sugarcanes

write("Length: ")
length = read()
function moveForward(length)
  for i = 1, length do
        turtle.forward()
  end
end
function switchLanes()
  moveForward(1)
  turtle.turnLeft()
  moveForward(2)
  turtle.turnLeft()
end
function dig()
  turtle.dig()
  moveForward(1)
  turtle.digDown()
end
function roam()
  for i = 1, length do
 --       while turtle.getFuelLevel() <= 20 do
 --         turtle.select(1)
 --         turtle.refuel(1)
 --       end
        if turtle.detect() then
          dig()
        else
         moveForward(1)
        end
  end
  switchLanes()
  sleep(60)
end

turtle.up()
turtle.up()

while true do
  roam()
end