contract InsecureRandomGenerator {
  bytes32 public randseed;

  function pseudoRandom(uint start, uint end)
      returns (uint) {
    randseed = keccak256(randseed, block.timestamp,
      block.blockhash(block.number-1), block.coinbase,
      block.difficulty, block.number);
    uint range = end - start + 1;
    uint randVal = start + uint256(randseed) % range;
    return randVal;
  }
}