stright

f,num,k,T=1,0,0,2

local function check()
if turtle.getFuelLevel()<10 then
turtle.select(f)
turtle.refuel(1)
end
term.clear()
term.setCursorPos(1,1)
term.write("f Level")
term.setCursorPos(1,2)
term.write("||"..turtle.getFuelLevel().."||")
end

check()

local function dig(x)
if x=="A" then turtle.digUp() turtle.dig() turtle.digDown() end
if x=="U" then turtle.digUp() end
if x=="F" then turtle.dig() end
if x=="D" then turtle.digDown() end
check()
end

local function go(y)
if y=="F" then if not turtle.forward() then dig("F") go("F") end end
if y=="R" then turtle.turnRight() end
if y=="L" then turtle.turnRight() end
if y=="B"then turtle.back() end
if y=="U" then if not turtle.up() then dig("U") go("U") end end
if y=="D" then turtle.down() end
end

term.clear()
term.setCursorPos(1,1)
print("Type a number of spaces to move 1x2 hole.")
print("---------------------------------------")
term.write("Number: ")

num=read()

go("U")
for i=1,num do
k=k+1
dig("A")
if k==8 then turtle.select(T) turtle.placeDown() k=0 end
go("F")
end
dig("D")
dig("U")
go("U")
for i=1,num do
go("B")
end
go("D")
go("D")
go("B")