while true do
 local action = math.random(1,3)


 if action == 1 then
  turtle.turnLeft()
 end

 if action == 2 then
  turtle.turnRight()
 end

 if action == 3 then
  local distance = math.random(1,10)
  for i = 1,distance do
   turtle.forward()
  end
 end
end