dig

-- pastebin get uQzgSxy3 dig

local args = { ... }
local length
local i = 0
local pos = 0

while #args < 1 do
    term.clear()
    print("\n\tUsage: dig < n >, where n = number of blocks to dig forward.")
    args[1] = tonumber(io.read())
end

length = tonumber(args[1])

if turtle.getFuelLevel() < length then
    term.clear()
    print("\n\tNot enough fuel.")
    return
end

print("Digging " .. length .. " blocks.")

while pos < length do
    if not turtle.forward() then
        if not turtle.dig() then
            term.clear()
            print ("\n\tCannot dig block in front!")
            return
        end

        turtle.forward()
    end
    pos = pos + 1
    sleep(0.5)
end

term.clear()
print ("Job complete.")
sleep(1)
return