View difference between Paste ID: 4HNrZqpR and 80XSHcef

 turtle.refuel() -- might as well, :P
 
 while true do -- loop
- local action = math.random(1,9) -- Random movement generator
+ local action = math.random(1,12) -- Random movement generator
 
  if action == 1 then -- forward
   for i = 1,5 do
    turtle.forward()
   end
  end
 
  if action == 2 then -- forward
   for i = 1,5 do
    turtle.forward()
   end
  end
 
  if action == 7 then -- forward
   for i = 1,5 do
    turtle.forward()
   end
  end
 
  if action == 8 then -- forward
   for i = 1,5 do
    turtle.forward()
   end
  end
 
  if action == 9 then -- forward
   for i = 1,5 do
    turtle.forward()
   end
  end
 
  if action == 3 then -- up
   turtle.up()
  end
 
  if action == 4 then -- down
   turtle.digDown()
   turtle.down()
  end
 
  if action == 10 then -- up
   for i = 1,5 do
    turtle.up()
   end
  end
 
  if action == 11 then -- down
   for i = 1,5 do
    turtle.down()
   end
  end
 
  if action == 5 then -- left
   turtle.turnLeft()
  end
 
  if action == 6 then -- right
   turtle.turnRight()
  end
 sleep(0.5)
 end -- end loop