Old Man Escape

It is a place near a forest where that house was built. The house was built at high elevation by using wooden pillars since it is near to that forest and animals come and go in that area. The only was to get down from the house and get in is by using a ladder. A boy and his grandpa is living there. The boy usually operates the ladder. This day he went out and mistakenly forgot to place the ladder. Now the grandpa has no way to get down the house. Help him by operating the ladder to get down.