The wolf was looking to harm 3 little pigs and the bad thing is that the 3 of them had 3 different types of houses, one made of straw, one made of wood and the last one made of bricks.
Then the wolf went to the second house of the middle brother and blew and on the first attempt failed so he decided to blow with much more force until he managed to knock it down, at that time the 2 little pigs went running to the house of the older brother.
if the 3 little pigs lived inthe samefirm house,theywouldnt be afraid.
Thelittlepiginthemiddlethoughtitwasenoughtokeephimselfsafetomakeawoodenhouse, so hewentintotheforesttolookforlogs.
Then the big bad wolf came to the younger piggy's house and wanted to tear the house down and started blowing and blowing and at the first attempt he succeeded as it was made of straw and made him run to his second brother's house, which was made of wood.
The wolf, angry at not being able to reach them, headed straight for the older brother's house and glad that there was no other way out, began to blow with all his might and he couldn't get it, he blew again and again and never managed to knock it down.