Run $ruby run.rb. You can change game setting in file game.rb (columns, rows and number of iterations).
You can place your file with coordinates to root folder with name inp.txt. Format for coordinates could be fill in with comas and semicolons, where first digit is Y and second on is a place of alive cell on X that you want to put inside. Example:
1,2; 1,3; 1,4; 1,5; 2,3;