How did the instructor built Douglas …

Firstly Douglas shared all his problems with his touter and also about the fobia. The instructor firstly tied a rope and tug it with Douglas and I part of the rope in the instructor's hand and asked Douglas to move in the water slowly slowly and secondly he make learnt him how to move legs and then hands and at last how to stay under water and then take breath outside the water and then the instructor made a comment that now Douglas u became a perfect swimmer. He became swimmer by 100 a times of practice of these all steps that was instructed by his instructor. To make sure that Douglas become a swimmer Douglas go to a lake and swims upto 2 miles and when he was in the mid his fear came back but with full confidence Douglas make a comment that I overcame u fear now go and started swimming .