Branch Mine

-- dig a 1x2 tunnel for x number of blocks, if null default of 10
-- Functions
function dedif(tf)
   if turtle.detect() then
      turtle.dig()
      if turtle.detectUp() then
         turtle.digUp()
      end
   end
   if tf then
      turtle.forward()
   end
end

-- Main Program
local length = 10
print("Please enter length of tunnel. If input is 0, will default to length of 10")
numRed = read()
if not numRed==0 then
   length = numRed
end
for i=1, length do -- dig the # of blocks in length
   dedif(true)
end
turtle.turnRight()
turtle.turnRight()
for i=1, length do -- go back
   turtle.forward()
end
for inv=1, 16 do -- drop all items
   turtle.select(i)
   turtle.drop()
end