basic.lua

function forward()
 while true do
  if turtle.forward() then
   break
   else
   turtle.attack()
   turtle.dig()
   os.sleep(1)
  end
 end
end

function up()
 while true do
  if turtle.up() then
  break
  else
  turtle.digUp()
  turtle.attackUp()
  os.sleep(1)
  end
 end
end

function down()
 while true do
  if turtle.down() then
   break
   else turtle,attackDown()
   turtle.digDown()
   os.sleep(1)
  end
 end
end