function attack()
  turtle.turnRight()
  turtle.attack()
  sleep(0.5)
  turtle.attack()
  turtle.turnLeft()
  turtle.forward()
end
while true do
  for i=0, 17 do
   attack()
  end
  turtle.turnRight()
  attack()
  attack()
  attack()
  turtle.turnRight()
  for i=0,17 do
    attack()
  end

 turtle.turnRight()
   attack()
   attack()
   attack()
 turtle.turnRight()
end