I want you to create the animated crocodile

please read carefully, my budget only $100-$300 Hello. .. I will explain you the scenes where I want you to create the animated crocodile. ... Sceen 1- Four boys started sailing on a boat ... all of a sudden the boat hits a sunken trunk & the boat turns the other side and the boys fall into the water. ...A crocodile who came under the water carries one boy. . (There the crocodile is under the water..so we it's not visible) Then the other 3 boys get scared and they start swimming to a near by tree which is located at the middle of the river. ..While they swim a crocodile should follow the boys from far. . (This is where I want the crocodile to be seen. ..I want to see only the eyes of it. ..) Sceen 2- While the boys are up in the tree the Crocodile comes near the tree and it jumps up opening it's mouth to see whether it can grab one boy. . (This is the second sceen I want to have crocodile) Sceen 3 Then after a while a boy gets down from the tree and reaches the boat again to turn it up. .. While he is turning it he hears his friends shouting. ..He turns back And at the moment a crocodile appears from the water. . (The crocodile should appear with a half open mouth) Then one boy who is up in the tree tries to get the attention of the crocodile to safe his Friend..He taps the water to get the attention. . (Here the crocodile should turn back and swim towards the boy near the tree) While the crocodile comes near they tree the boy get into they boat and the other climb up the tree. ..then again the crocodile disappears into the water. .. Sceen 4 The boy who is in the boat finds a knife. Suddenly the crocodile appears and tries to jump into the boat. . (Once or twice it tries to jump in) Then the boy fights with the crocodile and he hits it with the knife..The crocodile dies