Hi, here is my question I am trying to solve and sure if I done it right.

there is a square with 60 equal blocks.If a mosquito(bug)is set to fly starting at block 1, it is equally likely to fly to other blocks. what is the probability after n flies, the mosquito is at the 60th block (diagonally opposite to block 1). form the difference equation.

I am trying to use law of probability to solve it but cannot form the equation. but I tried forming the answer as the probability (Pn= 1-Pn-1)1/59. Is this right. can anybody here can help. Thank you.