Flip a coin with configurable number of sides. Optional sides parameter (default: 2). Uses true randomness from random.org. Special handling for edge cases (0, 1, or negative sides). For 2 sides: Returns 'Heads' or 'Tails'. For 3 sides: Returns 'Heads', 'Tails', or '_'. For n>3 sides: Returns 'It landed on side X'.