Dream of building

Dream of snake bite on leg: Would you please tell me the meaning of my dream as it follows... I was on my terrace then suddenly i saw a snake on the other terrace of a house he saw me and then slightly started to come to me and when i realised that the snake was coming to me i moved back and i saw that snake closer n closer n felled in the ground and entered our house and then i thought what to do suddenly when i saw the snake behind me then i jumped to other building and the chase began i ran up n down, i jumped from one building to other.. These chase went for atleast 1/2 hour and finally that snake hd given his hope of catching me... I also got tired and came down from up of building to my room.